v2.4.1.9

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Components of Income Tax Expense

Components of Income Tax Expense
Year ended December 31 (in millions)			2014		2013		2012
Current Expense (Benefit):
	Federal	$	2,392	$	3,183	$	3,004
	State		174		581		432
	Foreign		142		200		169
			2,708		3,964		3,605
Deferred Expense (Benefit):
	Federal		1,000		(76)		160
	State		173		108		(40)
	Foreign		(8)		(16)		19
			1,165		16		139
Income tax expense		$	3,873	$	3,980	$	3,744

Schedule of Items That Effect Income Tax Expense

Year ended December 31 (in millions)		2014		2013		2012
Federal tax at statutory rate	$	4,363	$	3,890	$	4,063
State income taxes, net of federal benefit		329		319		178
Foreign income taxes, net of federal credit		-		15		92
Nontaxable income attributable to noncontrolling interests		(62)		(103)		(620)
Adjustments to uncertain and effectively settled tax positions, net		(408)		58		114
Accrued interest on uncertain and effectively settled tax positions, net		(235)		114		23
Other		(114)		(313)		(106)
Income tax expense	$	3,873	$	3,980	$	3,744

Components of Net Deferred Tax Liability

Components of Net Deferred Tax Liability
December 31 (in millions)				2014		2013
Deferred Tax Assets:
	Net operating loss carryforwards		$	448	$	495
	Differences between book and tax basis of long-term debt			116		117
	Nondeductible accruals and other			3,383		3,588
	Less: Valuation allowance			375		405
				3,572		3,795
Deferred Tax Liabilities:
	Differences between book and tax basis of property and equipment and intangible assets			35,112		34,044
	Differences between book and tax basis of investments			186		473
	Differences between book and tax basis of indexed debt securities			534		610
	Differences between book and tax basis of foreign
		subsidiaries and undistributed foreign earnings		504		367
				36,336		35,494
Net deferred tax liability			$	32,764	$	31,699

Reconciliation of Unrecognized Tax Benefits

Reconciliation of Unrecognized Tax Benefits
(in millions)		2014		2013		2012
Balance, January 1	$	1,701	$	1,573	$	1,435
Additions based on tax positions related to the current year		63		90		154
Additions based on tax positions related to prior years		111		201		79
Additions from acquired subsidiaries		-		268		-
Reductions for tax positions of prior years		(220)		(141)		(60)
Reductions due to expiration of statutes of limitations		(448)		(3)		(3)
Settlements with taxing authorities		(36)		(287)		(32)
Balance, December 31	$	1,171	$	1,701	$	1,573

NBCUniversal Media, LLC [Member]

Components of Income Tax Expense

Components of Income Tax Expense
Year ended December 31 (in millions)		2014		2013		2012
Foreign
	Current income tax expense	$	33	$	77	$	69
	Deferred income tax expense		(8)		(16)		16
	Withholding tax expense		108		123		103
U.S. domestic tax expense			10		22		9
Income tax expense		$	143	$	206	$	197

X

- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

+ Details

Name:	us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

+ Details

Name:	us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

+ Details

Name:	us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

Name:	us-gaap_SummaryOfIncomeTaxContingenciesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=cmcsa_NBCUniversalMediaLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: