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<ACCEPTANCE-DATETIME>20251006081245
ACCESSION NUMBER:		0000950103-25-012851
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		15
CONFORMED PERIOD OF REPORT:	20251006
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20251006
DATE AS OF CHANGE:		20251006

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMCAST CORP
		CENTRAL INDEX KEY:			0001166691
		STANDARD INDUSTRIAL CLASSIFICATION:	CABLE & OTHER PAY TELEVISION SERVICES [4841]
		ORGANIZATION NAME:           	06 Technology
		EIN:				270000798
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32871
		FILM NUMBER:		251375677

	BUSINESS ADDRESS:	
		STREET 1:		ONE COMCAST CENTER
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103-2838
		BUSINESS PHONE:		215-286-1700

	MAIL ADDRESS:	
		STREET 1:		ONE COMCAST CENTER
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19103-2838

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AT&T COMCAST CORP
		DATE OF NAME CHANGE:	20020206
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<p style="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>UNITED STATES</b></p>

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<p style="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>SECURITIES AND EXCHANGE COMMISSION</b></p>

<p style="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>WASHINGTON, D.C. 20549</b></p>

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<p style="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>CURRENT REPORT</b></p>

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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8-K filing is intended
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    <td style="width: 0.25in"><span style="font-family: Times New Roman, Times, Serif"><span id="xdx_90E_edei--SolicitingMaterial_c20251006__20251006_zHHNFEDPpne4"><ix:nonNumeric contextRef="AsOf2025-10-06" format="ixt:booleanfalse" id="Fact000022" name="dei:SolicitingMaterial">&#9744;</ix:nonNumeric></span></span></td>
    <td>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</td></tr>
  </table>

<p style="margin-top: 0; margin-bottom: 0">&#160;</p>
<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <tr style="vertical-align: top">
    <td style="width: 0.25in"><span style="font-family: Times New Roman, Times, Serif"><span id="xdx_903_edei--PreCommencementTenderOffer_c20251006__20251006_zZvFG7sMtqnf"><ix:nonNumeric contextRef="AsOf2025-10-06" format="ixt:booleanfalse" id="Fact000023" name="dei:PreCommencementTenderOffer">&#9744;</ix:nonNumeric></span></span></td>
    <td>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</td></tr>
  </table>

<p style="margin-top: 0; margin-bottom: 0">&#160;</p>
<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <tr style="vertical-align: top">
    <td style="width: 0.25in"><span style="font-family: Times New Roman, Times, Serif"><span id="xdx_905_edei--PreCommencementIssuerTenderOffer_c20251006__20251006_zlUP5Ehgi6U3"><ix:nonNumeric contextRef="AsOf2025-10-06" format="ixt:booleanfalse" id="Fact000024" name="dei:PreCommencementIssuerTenderOffer">&#9744;</ix:nonNumeric></span></span></td>
    <td>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</td></tr>
  </table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Securities registered pursuant to Section 12(b) of the Act:</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <tr style="vertical-align: bottom">
    <td><span style="font-size: 10pt">Securities registered pursuant to Section 12(b) of the Act:</span></td></tr>
  </table>

<p style="margin-top: 0; margin-bottom: 0">&#160;</p>
<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <tr>
    <td style="vertical-align: bottom; text-align: center; width: 32%"><span style="font-size: 10pt"><b>Title of Each Class</b></span></td>
    <td style="vertical-align: bottom; width: 2%"><span style="font-size: 10pt">&#160;</span></td>
    <td style="vertical-align: bottom; text-align: center; width: 32%"><span style="font-size: 10pt"><b>Trading Symbol(s)</b></span></td>
    <td style="width: 2%">&#160;</td>
    <td style="vertical-align: bottom; text-align: center; width: 32%"><span style="font-size: 10pt"><b>Name of Each Exchange on Which Registered</b></span></td></tr>
  <tr style="vertical-align: bottom">
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    <td><span style="font-size: 10pt">&#160;</span></td>
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    <td style="text-align: center"><span style="font-size: 10pt">&#160;</span></td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90D_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0000PercentDue2026Member_zy0hTxl7fMA5"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0000PercentDue2026Member" id="Fact000028" name="dei:Security12bTitle">0.000% Notes due 2026</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_901_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2027Member_zTTUrshCQGI4"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2027Member" id="Fact000031" name="dei:Security12bTitle">0.250% Notes due 2027</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90C_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2027Member_zLaSixVIYvd9"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2027Member" id="Fact000032" name="dei:TradingSymbol">CMCS27</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_903_edei--SecurityExchangeName_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2027Member_zBMjhjVCbMml"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2027Member" format="ixt-sec:exchnameen" id="Fact000033" name="dei:SecurityExchangeName">The Nasdaq Stock Market LLC</ix:nonNumeric></span></span></td></tr>
  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90E_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes1.500PercentDue2029Member_zRY7S7wUlzai"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes1.500PercentDue2029Member" id="Fact000034" name="dei:Security12bTitle">1.500% Notes due 2029</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90F_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes1.500PercentDue2029Member_zfkAKq4VNyS8"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes1.500PercentDue2029Member" id="Fact000035" name="dei:TradingSymbol">CMCS29</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90F_edei--SecurityExchangeName_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes1.500PercentDue2029Member_zPjXk7Mwr7k9"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes1.500PercentDue2029Member" format="ixt-sec:exchnameen" id="Fact000036" name="dei:SecurityExchangeName">The Nasdaq Stock Market LLC</ix:nonNumeric></span></span></td></tr>
  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_909_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2029Member_zAOrisQe2Sj6"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2029Member" id="Fact000037" name="dei:Security12bTitle">0.250% Notes due 2029</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_908_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2029Member_z3NGiNKmaSe8"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2029Member" id="Fact000038" name="dei:TradingSymbol">CMCS29A</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_906_edei--SecurityExchangeName_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.250PercentDue2029Member_ztjDWqZbHRG3"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2029Member" format="ixt-sec:exchnameen" id="Fact000039" name="dei:SecurityExchangeName">The Nasdaq Stock Market LLC</ix:nonNumeric></span></span></td></tr>
  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_904_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.750PercentDue2032Member_zGLmyInrkZY"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member" id="Fact000040" name="dei:Security12bTitle">0.750% Notes due 2032</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90B_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.750PercentDue2032Member_ziMp2UVYlYI"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member" id="Fact000041" name="dei:TradingSymbol">CMCS32</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_907_edei--SecurityExchangeName_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes0.750PercentDue2032Member_zmNf0JZxe9y6"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member" format="ixt-sec:exchnameen" id="Fact000042" name="dei:SecurityExchangeName">The Nasdaq Stock Market LLC</ix:nonNumeric></span></span></td></tr>
  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_901_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes3.250PercentDue2032Member_zqfdITV6orF2"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes3.250PercentDue2032Member" id="Fact000043" name="dei:Security12bTitle">3.250% Notes due 2032</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_904_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes3.250PercentDue2032Member_zHu4clUdAnUi"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes3.250PercentDue2032Member" id="Fact000044" name="dei:TradingSymbol">CMCS32A</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_906_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes1.875PercentDue2036Member_zyxYZV9KWTXa"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes1.875PercentDue2036Member" id="Fact000046" name="dei:Security12bTitle">1.875% Notes due 2036</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_90B_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes3.550PercentDue2036Member_zRXINGIOMOvc"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes3.550PercentDue2036Member" id="Fact000049" name="dei:Security12bTitle">3.550% Notes due 2036</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_900_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes1.250PercentDue2040Member_zScUhW1QIkVk"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes1.250PercentDue2040Member" id="Fact000052" name="dei:Security12bTitle">1.250% Notes due 2040</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_909_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes5.250PercentDue2040Member_zFTi6hH7i621"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes5.250PercentDue2040Member" id="Fact000055" name="dei:Security12bTitle">5.250% Notes due 2040</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_904_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes5.50PercentDue2029Member_z4Yy6okGlppe"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes5.50PercentDue2029Member" id="Fact000058" name="dei:Security12bTitle">5.50% Notes due 2029</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_901_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--Notes5.50PercentDue2029Member_zNGlEeiPNay1"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_Notes5.50PercentDue2029Member" id="Fact000059" name="dei:TradingSymbol">CCGBP29</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
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  <tr>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_907_edei--Security12bTitle_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--ExchangeableSubordinatedDebentures2.0PercentDue2029Member_zvYI3ybgma79"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member" id="Fact000061" name="dei:Security12bTitle">2.0% Exchangeable Subordinated Debentures due 2029</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_906_edei--TradingSymbol_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--ExchangeableSubordinatedDebentures2.0PercentDue2029Member_zJA6gWBWf3Y8"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member" id="Fact000062" name="dei:TradingSymbol">CCZ</ix:nonNumeric></span></span></td>
    <td>&#160;</td>
    <td style="vertical-align: bottom; text-align: center"><span style="font-size: 10pt"><span id="xdx_907_edei--SecurityExchangeName_c20251006__20251006__us-gaap--StatementClassOfStockAxis__custom--ExchangeableSubordinatedDebentures2.0PercentDue2029Member_zCEGPPo2Bqi2"><ix:nonNumeric contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member" format="ixt-sec:exchnameen" id="Fact000063" name="dei:SecurityExchangeName">New York Stock Exchange</ix:nonNumeric></span></span></td></tr>
  </table>
<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Indicate by check mark whether the registrant is an emerging growth
company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange
Act of 1934 (&#167;240.12b-2 of this chapter).</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Emerging growth company <span style="font-family: Times New Roman, Times, Serif"><span id="xdx_902_edei--EntityEmergingGrowthCompany_c20251006__20251006_zVmQdgbbYetk"><ix:nonNumeric contextRef="AsOf2025-10-06" format="ixt:booleanfalse" id="Fact000064" name="dei:EntityEmergingGrowthCompany">&#9744;</ix:nonNumeric></span></span></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If an emerging growth company, indicate by check mark if the registrant
has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant
to Section 13(a) of the Exchange Act. <span style="font-family: Times New Roman, Times, Serif">&#9744;</span></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></p>


<p style="margin: 0"></p>
<p style="border-bottom: Black 1pt solid; margin: 0">&#160;</p>

<p style="border-bottom: Black 3pt solid; margin: 0pt; padding-top: 0pt; padding-bottom: 2pt"></p>

<p style="margin: 0"></p>


<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></p>


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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><b>Item 8.01 Other Events</b></p>



<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt">Attached as Exhibit 99.1 and incorporated by reference herein
is a press release dated October 6, 2025, issued by Comcast Corporation.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><b>Item 9.01(d) Exhibits</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 9.35pt">&#160;</p>

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  <tr>
    <td style="vertical-align: top"><a href="dp235537_ex9901.htm"><span style="color: #0000EE"><span style="text-decoration: underline">99.1</span></span></a></td>
    <td style="vertical-align: bottom">&#160;</td>
    <td style="vertical-align: top"><a href="dp235537_ex9901.htm"><span style="color: #0000EE"><span style="text-decoration: underline">Comcast Corporation Press Release dated October 6, 2025.</span></span></a></td></tr>
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    <td style="vertical-align: bottom"><span style="font-size: 12pt">&#160;</span></td>
    <td style="vertical-align: top">Cover Page Interactive Data File (embedded within the Inline XBRL document).</td></tr>
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<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><b>SIGNATURES</b></p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&#160;</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</p>

<p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&#160;</p>

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  <tr>
    <td style="vertical-align: bottom; width: 5%">Date:</td>
    <td style="vertical-align: bottom; width: 45%">October 6, 2025</td>
    <td style="vertical-align: bottom; width: 5%">By:</td>
    <td style="vertical-align: bottom; width: 45%">/s/ Elizabeth Wideman</td></tr>
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  <tr>
    <td>&#160;</td>
    <td>&#160;</td>
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    <td style="vertical-align: top">Senior Vice President, Senior Deputy General Counsel and Assistant Secretary</td></tr>
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<DESCRIPTION>EXHIBIT 99.1
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="text-align: right; margin: 0"><B>Exhibit 99.1</B></P>

<P STYLE="margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="margin: 0; text-align: right"><B></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-align: center; text-indent: 0pt"><IMG SRC="image_002.jpg" ALT="" STYLE="height: 122px; width: 217px"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in"><FONT STYLE="font-size: 11pt; text-transform: uppercase"><B>COMCAST
ANNOUNCES EXPIRATION DATE RESULTS FOR amended <BR>
POOL 2 EXCHANGE OFFERS AND amended Pool 2 CASH OFFERS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B>Philadelphia, Pennsylvania, October 6, 2025</B>&nbsp;-
Comcast Corporation (Nasdaq: CMCSA)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B><I>Exchange Offers</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Comcast Corporation (Nasdaq: CMCSA) (&ldquo;Comcast&rdquo;)
today announced the preliminary expiration date results of its two separate private offers to exchange (collectively, the &ldquo;Amended
Pool 2 Exchange Offers&rdquo;) any and all of the outstanding series of notes listed in the tables below (collectively, the &ldquo;Pool
2 Notes&rdquo;) for newly issued 5.168% Notes due 2037 (the &ldquo;New 2037 Notes&rdquo;) on the terms and subject to the conditions set
forth in the Offering Memorandum dated September 22, 2025 as supplemented by the Supplement to the Offering Memorandum dated September
29, 2025 (as supplemented, the &ldquo;Amended Offering Memorandum&rdquo;), the eligibility certification and the accompanying exchange
offer notice of guaranteed delivery (the &ldquo;Amended Exchange Offer Notice of Guaranteed Delivery&rdquo; which, together with the Amended
Offering Memorandum and the eligibility certification, constitute the &ldquo;Amended Exchange Offer Documents&rdquo;). Unless otherwise
defined herein, capitalized terms related to the Amended Pool 2 Exchange Offers used under the heading &ldquo;Exchange Offers&rdquo; have
the respective meanings assigned thereto in the Amended Exchange Offer Documents.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The tables below indicate, among other things,
the aggregate principal amount of each series of Pool 2 Notes validly tendered for exchange and not validly withdrawn at or prior to the
Amended Pool 2 Exchange Offer Expiration Date (as defined in the Amended Offering Memorandum) in connection with Comcast&rsquo;s offer
to exchange any and all of its outstanding notes listed below for the New 2037 Notes:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><I>Pool 2 Notes</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3pt; width: 10%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Acceptance
    Priority Level</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 22%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Title
    of Series of Pool 2 Notes to be Exchanged</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 8%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>CUSIP</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 11%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Outstanding (mm)</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 15%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Aggregate
    Principal Amount Tendered for Exchange</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 16%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Tendered for Exchange by the Amended Pool 2 Exchange Offer Expiration Date</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 18%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Tendered for Exchange Subject to Guaranteed Delivery</B></FONT></P>
    </TD></TR>
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    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">4.150% Notes due 2028 </FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">20030N CT6 </FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$3,975</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$384,716,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$371,143,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 9pt">$13,573,000</FONT></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-size: 9pt">&nbsp;</FONT></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">2</FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">4.550% Notes due 2029 </FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">20030N ED9 </FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$1,000</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$101,319,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$99,684,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; font-size: 10pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$1,635,000 </FONT></TD></TR>
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<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-top: 6pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt">&nbsp;</P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">As the aggregate principal amount of each series
of Pool 2 Notes validly tendered for exchange and not validly withdrawn at or prior to the Amended Pool 2 Exchange Offer Expiration Date
is less than the Amended Pool 2 New 2037 Notes Maximum Amount (as defined in the Amended Offering Memorandum), subject to the satisfaction
or waiver of the conditions of the Amended Pool 2 Exchange Offers described in the Amended Offering Memorandum, Comcast expects to accept
for exchange all such Pool 2 Notes validly tendered for exchange and not validly withdrawn at or prior to the Amended Pool 2 Exchange
Offer Expiration Date. Assuming such acceptance and assuming all Pool 2 Notes tendered for exchange subject to guaranteed delivery are
delivered pursuant to the Guaranteed Delivery Procedures, Comcast expects to issue approximately $491 million aggregate principal amount
of New 2037 Notes in exchange for such Pool 2 Notes. The actual aggregate principal amount of New 2037 Notes that will be issued on the
Amended Pool 2 Exchange Offer Settlement Date (as defined in the Amended Offering Memorandum) in exchange for such Pool 2 Notes is subject
to change, based on the amount of Pool 2 Notes delivered pursuant to the Guaranteed Delivery Procedures.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">If and when issued, the New 2037 Notes will not
be registered under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), or any state securities laws. Therefore,
the New 2037 Notes may not be offered or sold in the United States absent registration or an applicable exemption from the registration
requirements of the Securities Act and any applicable state securities laws. Comcast will enter into a registration rights agreement with
respect to the New 2037 Notes.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Global Bondholder Services Corporation is acting
as the Information Agent and the Exchange Agent for the Amended Pool 2 Exchange Offers. Questions or requests for assistance related
to the Amended Pool 2 Exchange Offers or for additional copies of the Amended Exchange Offer Documents may be directed to Global Bondholder
Services Corporation at (212) 430-3774. You may also contact your broker, dealer, commercial bank, trust company or other nominee for
assistance concerning the Amended Pool 2 Exchange Offers. The Amended Exchange Offer Documents can be accessed at the following link:
<FONT STYLE="color: Blue"><U>https://gbsc-usa.com/eligibility/comcast</U></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B><I>Cash Offers</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Comcast today announced the preliminary expiration
date results of its two separate offers to purchase for cash (the &ldquo;Amended Pool 2 Cash Offers&rdquo;) any and all of each series
of Pool 2 Notes, on the terms and subject to the conditions set forth in the Offer to Purchase dated September 22, 2025 as supplemented
by the Supplement to the Offer to Purchase dated September 29, 2025 (as supplemented, the &ldquo;Amended Offer to Purchase&rdquo;), the
certification instructions letter (the &ldquo;Certification Instructions Letter&rdquo;) and the accompanying cash offer notice of guaranteed
delivery (the &ldquo;Amended Cash Offer Notice of Guaranteed Delivery&rdquo; which, together with the Amended Offer to Purchase and the
Certification Instructions Letter, constitute the &ldquo;Amended Cash Offer Documents&rdquo; and, collectively with the Amended Exchange
Offer Documents, the &ldquo;Amended Offer Documents&rdquo;). Only holders who are not Exchange Offer Eligible Holders (&ldquo;Cash Offer
Eligible Holders&rdquo;) are eligible to participate in the Amended Pool 2</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">Cash Offers. Holders of Pool 2 Notes participating
in the Amended Pool 2 Cash Offers are required to complete the Certification Instructions Letter and certify that they are Cash Offer
Eligible Holders.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Unless otherwise defined herein, capitalized terms
used under the heading &ldquo;Cash Offers&rdquo; related to the Amended Pool 2 Cash Offers have the respective meanings assigned thereto
in the Amended Cash Offer Documents.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The tables below indicate, among other things,
the aggregate principal amount of each series of Pool 2 Notes validly tendered for purchase and not validly withdrawn at or prior to the
Amended Pool 2 Cash Offer Expiration Date (as defined in the Amended Offer to Purchase) in connection with Comcast&rsquo;s offer to purchase
any and all of its outstanding notes listed below:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><I>Pool 2 Notes</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3pt; width: 10%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Acceptance
    Priority Level</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 22%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Title
    of Series of Pool 2 Notes</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 8%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>CUSIP</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 11%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Outstanding (mm)</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 15%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Aggregate
    Principal Amount Tendered</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 16%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Tendered by the Amended Pool 2 Cash Offer Expiration Date</B></FONT></P>
    </TD>
    <TD STYLE="padding-right: 3pt; width: 18%; padding-left: 3pt"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 9pt"><B>Principal
    Amount Tendered Subject to Guaranteed Delivery</B></FONT></P>
    </TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">4.150% Notes due 2028 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">20030N CT6 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$3,975</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$378,596,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$378,596,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">2</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">4.550% Notes due 2029 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">20030N ED9 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$1,000</FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$67,614,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">$67,614,000 </FONT></TD>
    <TD STYLE="padding-right: 3pt; padding-left: 3pt"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">As the aggregate principal amount of each series
of Pool 2 Notes validly tendered for purchase and not validly withdrawn at or prior to the Amended Pool 2 Cash Offer Expiration Date is
less than the Amended Maximum Pool 2 Consideration Amount (as defined in the Amended Offer to Purchase), subject to the satisfaction or
waiver of the conditions of the Amended Pool 2 Cash Offers described in the Amended Offer to Purchase, Comcast expects to accept for purchase
all such Pool 2 Notes validly tendered for purchase and not validly withdrawn at or prior to the Amended Pool 2 Cash Offer Expiration
Date. The actual aggregate principal amount that will be payable on the Amended Pool 2 Cash Offer Settlement Date for such Pool 2 Notes
is subject to change, based on the amount of Pool 2 Notes delivered pursuant to the Guaranteed Delivery Procedures.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Global Bondholder Services Corporation is acting
as the Information Agent and the Tender Agent for the Amended Pool 2 Cash Offers. Questions or requests for assistance related to the
Amended Pool 2 Cash Offers or for additional copies of the Amended Cash Offer Documents may be directed to Global Bondholder Services
Corporation at (212) 430-3774. You may also contact your broker, dealer, commercial bank, trust company or other nominee for assistance
concerning the Amended Pool 2 Cash Offers. The Amended Cash Offer Documents can be accessed at the following link:&nbsp;<FONT STYLE="color: Blue"><U>https://www.gbsc-usa.com/comcast</U></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Comcast refers to the Amended Pool 2 Exchange Offers
and the Amended Pool 2 Cash Offers, collectively, as the &ldquo;Amended Pool 2 Offers.&rdquo;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This announcement is for informational purposes
only. This announcement is not an offer to purchase or a solicitation of an offer to purchase any of the securities described herein.
The Amended Pool 2 Exchange Offers are being made solely pursuant to the Amended Offering Memorandum and related documents and the Amended
Pool 2 Cash Offers are being made solely pursuant to the Amended Offer to Purchase and related documents. The Pool 2 Offers are not being
made to holders of Pool 2 Notes in any jurisdiction in which the making or acceptance thereof would not be in compliance with the securities,
blue sky or other laws of such jurisdiction. In any jurisdiction in which the securities laws or blue sky laws require the Amended Pool
2 Offers to be made by a licensed broker or dealer, the Amended Pool 2 Offers will be deemed to be made on behalf of Comcast by the dealer
managers or one or more registered brokers or dealers that are licensed under the laws of such jurisdiction.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Amended Pool 2 Exchange Offers are only being
made, and the New 2037 Notes are only being offered and will only be issued, and copies of the Amended Exchange Offer Documents were only
made available, to holders of Pool 2 Notes (1) that are either (a) &ldquo;qualified institutional buyers,&rdquo; or &ldquo;QIBs,&rdquo;
as that term is defined in Rule 144A under the Securities Act, in a private transaction in reliance upon an exemption from the registration
requirements of the Securities Act or (b) persons other than &ldquo;U.S. persons,&rdquo; as that term is defined in Rule 902 under the
Securities Act, in offshore transactions in reliance upon Regulation S under the Securities Act, or a dealer or other professional fiduciary
organized, incorporated or (if an individual) residing in the United States holding a discretionary account or similar account (other
than an estate or a trust) for the benefit or account of a non-&ldquo;U.S. person,&rdquo; and (2) (a) if located or resident in any Member
State of the European Economic Area, who are persons other than &ldquo;retail investors&rdquo; (for these purposes, a retail investor
means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended,
&ldquo;MiFID II&rdquo;); or (ii) a customer within the meaning of Directive (EU) 2016/97 (as amended, the &ldquo;Insurance Distribution
Directive&rdquo;), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II;
or (iii) not a &ldquo;qualified investor&rdquo; as defined in Regulation (EU) 2017/1129 (as amended, the &ldquo;Prospectus Regulation&rdquo;)),
and consequently no key information document required by Regulation (EU) No 1286/2014 (as amended, the &ldquo;PRIIPs Regulation&rdquo;)
for offering or selling the New 2037 Notes or otherwise making them available to retail investors in the European Economic Area has been
prepared and therefore offering or selling the New 2037 Notes or otherwise making them available to any retail investor in the European
Economic Area may be unlawful under the PRIIPs Regulation; (b) if located or resident in the United Kingdom, who are persons other than
&ldquo;retail investors&rdquo; (for these purposes, a retail investor means a person who is one (or more) of: (i) a retail client, as
defined in point (8) of Article 2 of Regulation (EU) No 2017/565 as it forms part of domestic law by virtue of the European Union (Withdrawal)
Act 2018 (&ldquo;EUWA&rdquo;); or (ii) a customer within the meaning of the provisions of the Financial Services and Markets Act 2000
(the &ldquo;FSMA&rdquo;) and any rules or regulations made under the FSMA to implement the Insurance Distribution Directive, where that
customer would not qualify as a professional client, as defined in point (8) of Article 2(1) of Regulation (EU) No 2017/565 as it forms
part of domestic law by virtue of the EUWA; or (iii) not a qualified investor as defined in the Prospectus Regulation as it forms part
of domestic law by virtue of the EUWA), and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">consequently no key information document required
by Regulation (EU) No 1286/2014 as it forms part of domestic law by virtue of the EUWA (the &ldquo;UK PRIIPs Regulation&rdquo;) for offering
or selling the New 2037 Notes or otherwise making them available to retail investors in the United Kingdom has been prepared and therefore
offering or selling the New 2037 Notes or otherwise making them available to any retail investor in the United Kingdom may be unlawful
under the UK PRIIPs Regulation; or (c) if located or resident in a province of Canada, who are &ldquo;accredited investors&rdquo; as such
term is defined in National Instrument 45-106 &ndash;&nbsp;<I>Prospectus Exemptions</I>, and, if resident in Ontario, section 73.3(1)
of the&nbsp;<I>Securities Act&nbsp;</I>(Ontario), in each case, that are not individuals unless that person is also a &ldquo;permitted
client&rdquo; as defined in National Instrument 31-103 &ndash;<I>&nbsp;Registration Requirements, Exemptions and Ongoing Registrant Obligations</I>&nbsp;(the
&ldquo;Exchange Offer Eligible Holders&rdquo;).&nbsp;<B>Only Exchange Offer Eligible Holders who completed and returned the eligibility
certification are authorized to receive or review the Amended Offering Memorandum or to participate in the Amended Pool 2 Exchange Offers.
For Canadian Eligible Holders tendering Pool 2 Notes, such participation is also conditioned upon the receipt of beneficial ownership
information, including a completed certification form which is required if tendering Pool 2 Notes. There is no separate letter of transmittal
in connection with the Amended Offering Memorandum.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><FONT STYLE="text-transform: uppercase"><B>Cautionary
Statement Regarding Forward-Looking Statements</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This press release contains forward-looking statements.
Readers are cautioned that such forward-looking statements involve risks and uncertainties that could cause actual events or our actual
results to differ materially from those expressed in any such forward-looking Statements. Readers are directed to Comcast&rsquo;s periodic
and other reports filed with the Securities and Exchange Commission and the &ldquo;Risk Factors&rdquo; contained in the Amended Offering
Memorandum and the Amended Offer to Purchase for a description of such risks and uncertainties. We undertake no obligation to update any
forward-looking statements.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"><B>Investor Contacts:&nbsp;</B><BR>
Marci Ryvicker&nbsp;(215) 286-4781&nbsp;<BR>
Jane Kearns&nbsp;(215) 286-4794&nbsp;<BR>
Marc Kaplan&nbsp;(215) 286-6527&nbsp;<BR>
<BR>
<B>Press Contacts:&nbsp;</B><BR>
Jennifer Khoury&nbsp;(215) 286-7408&nbsp;<BR>
John Demming&nbsp;(215) 286-8011</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>


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<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>5
<FILENAME>cmcsa-20251006_lab.xml
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentShellCompanyEventDate_lbl" xml:lang="en-US">Document Shell Company Event Date</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodStartDate" xlink:to="dei_DocumentPeriodStartDate_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodStartDate_lbl" xml:lang="en-US">Document Period Start Date</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US">Document Period End Date</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US">Document Fiscal Period Focus</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US">Document Fiscal Year Focus</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US">Current Fiscal Year End Date</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFileNumber_lbl" xml:lang="en-US">Entity File Number</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US">Entity Registrant Name</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US">Entity Central Index Key</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPrimarySicNumber" xlink:label="dei_EntityPrimarySicNumber" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityPrimarySicNumber" xlink:to="dei_EntityPrimarySicNumber_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityPrimarySicNumber_lbl" xml:lang="en-US">Entity Primary SIC Number</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xml:lang="en-US">Entity Tax Identification Number</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressAddressLine1_lbl" xml:lang="en-US">Entity Address, Address Line One</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressAddressLine2_lbl" xml:lang="en-US">Entity Address, Address Line Two</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine3" xlink:label="dei_EntityAddressAddressLine3" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine3" xlink:to="dei_EntityAddressAddressLine3_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressAddressLine3_lbl" xml:lang="en-US">Entity Address, Address Line Three</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressCityOrTown_lbl" xml:lang="en-US">Entity Address, City or Town</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressStateOrProvince_lbl" xml:lang="en-US">Entity Address, State or Province</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCountry" xlink:label="dei_EntityAddressCountry" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCountry" xlink:to="dei_EntityAddressCountry_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressCountry_lbl" xml:lang="en-US">Entity Address, Country</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressPostalZipCode_lbl" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CountryRegion" xlink:label="dei_CountryRegion" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CountryRegion" xlink:to="dei_CountryRegion_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CountryRegion_lbl" xml:lang="en-US">Country Region</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CityAreaCode_lbl" xml:lang="en-US">City Area Code</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LocalPhoneNumber_lbl" xml:lang="en-US">Local Phone Number</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Extension" xlink:label="dei_Extension" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Extension" xlink:to="dei_Extension_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_Extension_lbl" xml:lang="en-US">Extension</link:label>
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      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_WrittenCommunications_lbl" xml:lang="en-US">Written Communications</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:label="dei_SolicitingMaterial" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_SolicitingMaterial_lbl" xml:lang="en-US">Soliciting Material</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:label="dei_PreCommencementTenderOffer" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_PreCommencementTenderOffer_lbl" xml:lang="en-US">Pre-commencement Tender Offer</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="dei_PreCommencementIssuerTenderOffer" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xml:lang="en-US">Pre-commencement Issuer Tender Offer</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_Security12bTitle_lbl" xml:lang="en-US">Title of 12(b) Security</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag" xlink:label="dei_NoTradingSymbolFlag" />
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      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_NoTradingSymbolFlag_lbl" xml:lang="en-US">No Trading Symbol Flag</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US">Trading Symbol</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_SecurityExchangeName_lbl" xml:lang="en-US">Security Exchange Name</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12gTitle" xlink:label="dei_Security12gTitle" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12gTitle" xlink:to="dei_Security12gTitle_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_Security12gTitle_lbl" xml:lang="en-US">Title of 12(g) Security</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityReportingObligation" xlink:label="dei_SecurityReportingObligation" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityReportingObligation" xlink:to="dei_SecurityReportingObligation_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_SecurityReportingObligation_lbl" xml:lang="en-US">Security Reporting Obligation</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AnnualInformationForm" xlink:label="dei_AnnualInformationForm" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AnnualInformationForm" xlink:to="dei_AnnualInformationForm_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AnnualInformationForm_lbl" xml:lang="en-US">Annual Information Form</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditedAnnualFinancialStatements" xlink:label="dei_AuditedAnnualFinancialStatements" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditedAnnualFinancialStatements" xlink:to="dei_AuditedAnnualFinancialStatements_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AuditedAnnualFinancialStatements_lbl" xml:lang="en-US">Audited Annual Financial Statements</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityWellKnownSeasonedIssuer" xlink:to="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" />
      <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityVoluntaryFilers" xlink:to="dei_EntityVoluntaryFilers_lbl" xlink:type="arc" />
      <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityVoluntaryFilers_lbl" xml:lang="en-US">Entity Voluntary Filers</link:label>
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" />
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<TYPE>EX-101.PRE
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<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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</head>
<body>
<span style="display: none;">v3.25.2</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cover<br></strong></div></th>
<th class="th"><div>Oct. 06, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Oct.  06,  2025<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-32871<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Comcast Corporation<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001166691<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">27-0000798<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">PA<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">One Comcast Center<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Philadelphia<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">PA<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">19103-2838<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">215<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">286-1700<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember', window );">Common Class A [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Class A Common Stock, $0.01 par value<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCSA<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0000PercentDue2026Member', window );">Notes 0000 Percent Due 2026 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">0.000% Notes due 2026<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS26<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2027Member', window );">Notes 0. 250 Percent Due 2027 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">0.250% Notes due 2027<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS27<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.500PercentDue2029Member', window );">Notes 1. 500 Percent Due 2029 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">1.500% Notes due 2029<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS29<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2029Member', window );">Notes 0. 250 Percent Due 2029 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">0.250% Notes due 2029<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS29A<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.750PercentDue2032Member', window );">Notes 0. 750 Percent Due 2032 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">0.750% Notes due 2032<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS32<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.250PercentDue2032Member', window );">Notes 3. 250 Percent Due 2032 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">3.250% Notes due 2032<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS32A<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.875PercentDue2036Member', window );">Notes 1. 875 Percent Due 2036 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">1.875% Notes due 2036<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS36<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.550PercentDue2036Member', window );">Notes 3. 550 Percent Due 2036 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">3.550% Notes due 2036<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS36A<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.250PercentDue2040Member', window );">Notes 1. 250 Percent Due 2040 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">1.250% Notes due 2040<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS40<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes5.250PercentDue2040Member', window );">Notes 5. 250 Percent Due 2040 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">5.250% Notes due 2040<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CMCS40A<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes5.50PercentDue2029Member', window );">Notes 5. 50 Percent Due 2029 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">5.50% Notes due 2029<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CCGBP29<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=CMCSA_ExchangeableSubordinatedDebentures2.0PercentDue2029Member', window );">Exchangeable Subordinated Debentures 2. 0 Percent Due 2029 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">2.0% Exchangeable Subordinated Debentures due 2029<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">CCZ<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14a<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0000PercentDue2026Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes0000PercentDue2026Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2027Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2027Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.500PercentDue2029Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.500PercentDue2029Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2029Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.250PercentDue2029Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.750PercentDue2032Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes0.750PercentDue2032Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.250PercentDue2032Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.250PercentDue2032Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.875PercentDue2036Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes1.875PercentDue2036Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.550PercentDue2036Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementClassOfStockAxis=CMCSA_Notes3.550PercentDue2036Member</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
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      contextRef="From2025-10-062025-10-06_us-gaap_CommonClassAMember"
      id="Fact000025">Class A Common Stock, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_us-gaap_CommonClassAMember"
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      id="Fact000027">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes0000PercentDue2026Member"
      id="Fact000028">0.000% Notes due 2026</dei:Security12bTitle>
    <dei:TradingSymbol
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    <dei:SecurityExchangeName
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    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2027Member"
      id="Fact000031">0.250% Notes due 2027</dei:Security12bTitle>
    <dei:TradingSymbol
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    <dei:SecurityExchangeName
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      id="Fact000033">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes1.500PercentDue2029Member"
      id="Fact000034">1.500% Notes due 2029</dei:Security12bTitle>
    <dei:TradingSymbol
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      id="Fact000035">CMCS29</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000036">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
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      id="Fact000037">0.250% Notes due 2029</dei:Security12bTitle>
    <dei:TradingSymbol
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      id="Fact000038">CMCS29A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2025-10-062025-10-06_custom_Notes0.250PercentDue2029Member"
      id="Fact000039">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member"
      id="Fact000040">0.750% Notes due 2032</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member"
      id="Fact000041">CMCS32</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2025-10-062025-10-06_custom_Notes0.750PercentDue2032Member"
      id="Fact000042">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes3.250PercentDue2032Member"
      id="Fact000043">3.250% Notes due 2032</dei:Security12bTitle>
    <dei:TradingSymbol
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      id="Fact000044">CMCS32A</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000045">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes1.875PercentDue2036Member"
      id="Fact000046">1.875% Notes due 2036</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_Notes1.875PercentDue2036Member"
      id="Fact000047">CMCS36</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2025-10-062025-10-06_custom_Notes1.875PercentDue2036Member"
      id="Fact000048">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes3.550PercentDue2036Member"
      id="Fact000049">3.550% Notes due 2036</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_Notes3.550PercentDue2036Member"
      id="Fact000050">CMCS36A</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000051">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes1.250PercentDue2040Member"
      id="Fact000052">1.250% Notes due 2040</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_Notes1.250PercentDue2040Member"
      id="Fact000053">CMCS40</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000054">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
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      id="Fact000055">5.250% Notes due 2040</dei:Security12bTitle>
    <dei:TradingSymbol
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      id="Fact000056">CMCS40A</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000057">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_Notes5.50PercentDue2029Member"
      id="Fact000058">5.50% Notes due 2029</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_Notes5.50PercentDue2029Member"
      id="Fact000059">CCGBP29</dei:TradingSymbol>
    <dei:SecurityExchangeName
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      id="Fact000060">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member"
      id="Fact000061">2.0% Exchangeable Subordinated Debentures due 2029</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member"
      id="Fact000062">CCZ</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="From2025-10-062025-10-06_custom_ExchangeableSubordinatedDebentures2.0PercentDue2029Member"
      id="Fact000063">NYSE</dei:SecurityExchangeName>
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