<SEC-DOCUMENT>0001193125-20-120011.txt : 20200427
<SEC-HEADER>0001193125-20-120011.hdr.sgml : 20200427
<ACCEPTANCE-DATETIME>20200427063058
ACCESSION NUMBER:		0001193125-20-120011
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20200424
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20200427
DATE AS OF CHANGE:		20200427

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Aon plc
		CENTRAL INDEX KEY:			0000315293
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		IRS NUMBER:				363051915
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07933
		FILM NUMBER:		20817149

	BUSINESS ADDRESS:	
		STREET 1:		THE LEADENHALL BUILDING
		STREET 2:		122 LEADENHALL STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC3V 4AN
		BUSINESS PHONE:		(44) 20 7623 5500

	MAIL ADDRESS:	
		STREET 1:		THE LEADENHALL BUILDING
		STREET 2:		122 LEADENHALL STREET
		CITY:			LONDON
		STATE:			X0
		ZIP:			EC3V 4AN

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AON CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COMBINED INTERNATIONAL CORP
		DATE OF NAME CHANGE:	19870504
</SEC-HEADER>
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<td style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</td></tr></table><p style="margin-bottom:0px;margin-top:6pt"></p>
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<td style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</td></tr></table><p style="margin-bottom:0px;margin-top:6pt"></p>
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<td style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">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-bottom:0px;margin-top:6pt"></p>
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<td style="width:4%;vertical-align:top;white-space:nowrap;"> <span style="font-family:Times New Roman;font-weight:normal"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24" name="dei:PreCommencementIssuerTenderOffer" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></span></td>
<td style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">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-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">Securities registered pursuant to Section 12(b) of the Act:</p>
<table cellspacing="0" cellpadding="0" border="0" style="font-size:10pt;border-collapse:separate;border-spacing:0;width:100%;margin-bottom:0px;margin-top:12pt;margin-left:auto;margin-right:auto">
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<td style="width:34%;"></td>
<td></td>
<td style="width:33%;"></td>
<td style="width:1%;"></td>
<td style="width:33%;"></td></tr>
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<td style="border-bottom:1pt solid #000000;white-space:nowrap;vertical-align:bottom;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">Title of each class</p></td>
<td style="vertical-align:bottom;">&#160;</td>
<td style="border-bottom:1pt solid #000000;vertical-align:bottom;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">Trading</p><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">Symbol(s)</p></td>
<td style="vertical-align:bottom;">&#160;</td>
<td style="border-bottom:1pt solid #000000;vertical-align:bottom;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">Name of each exchange</p><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">on which registered</p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_us-gaap-CommonClassAMember" name="dei:Security12bTitle">Class A Ordinary Shares, $0.01 nominal value</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_us-gaap-CommonClassAMember" name="dei:TradingSymbol">AON</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_us-gaap-CommonClassAMember" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
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<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 2.800% Senior Notes due 2021</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member" name="dei:TradingSymbol">AON21</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
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<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 4.000% Senior Notes due 2023</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member" name="dei:TradingSymbol">AON23</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 3.500% Senior Notes due 2024</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member" name="dei:TradingSymbol">AON24</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
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<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 3.875% Senior Notes due 2025</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member" name="dei:TradingSymbol">AON25</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
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<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 2.875% Senior Notes due 2026</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member" name="dei:TradingSymbol">AON26</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.250PercentSeniorNotesDue2042Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 4.250% Senior Notes due 2042</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.250PercentSeniorNotesDue2042Member" name="dei:TradingSymbol">AON42</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.250PercentSeniorNotesDue2042Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.450PercentSeniorNotesDue2043Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 4.450% Senior Notes due 2043</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.450PercentSeniorNotesDue2043Member" name="dei:TradingSymbol">AON43</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.450PercentSeniorNotesDue2043Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.600PercentSeniorNotesDue2044Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 4.600% Senior Notes due 2044</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.600PercentSeniorNotesDue2044Member" name="dei:TradingSymbol">AON44</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.600PercentSeniorNotesDue2044Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr>
<tr style="page-break-inside:avoid;font-size:10pt;">
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.750PercentSeniorNotesDue2045Member" name="dei:Security12bTitle">Guarantees of Aon plc&#8217;s 4.750% Senior Notes due 2045</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.750PercentSeniorNotesDue2045Member" name="dei:TradingSymbol">AON45</ix:nonNumeric></p></td>
<td style="vertical-align:top;">&#160;</td>
<td style="vertical-align:top;padding:0;"><p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt"><ix:nonNumeric contextRef="duration_2020-04-24_to_2020-04-24_us-gaap-StatementClassOfStockAxis_aon-GuaranteesOfAonPlcs4.750PercentSeniorNotesDue2045Member" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric></p></td></tr></table><p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">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-family:Times New Roman;text-align:right;font-size:10pt;margin-bottom:0px;margin-top:12pt">Emerging growth company&#160;&#160;<span style="font-family:Times New Roman;font-weight:normal"><ix:nonNumeric name="dei:EntityEmergingGrowthCompany" contextRef="duration_2020-04-24_to_2020-04-24" format="ixt-sec:boolballotbox">&#9744;</ix:nonNumeric></span></p><p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">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.&#160;&#160;<span style="font-family:Times New Roman;font-weight:normal">&#9744;</span></p><p style="margin-bottom:0px;margin-top:10pt"></p><div style="text-align:center"><p style="line-height:0.5pt;border-bottom:0.50px solid #000000;width:100%;margin-top:0pt;margin-bottom:0pt">&#160;</p></div><div style="text-align:center"><p style="line-height:3pt;border-bottom:0.50px solid #000000;width:100%;margin-top:0pt;margin-bottom:2pt">&#160;</p></div><div></div><p style="margin-top:1em;margin-bottom:0em"></p></div><p style='page-break-before:always'></p> <hr style="color:#999999;height:3px;width:100%" /><div style="font-size:10pt;width:8.5in;margin:0 auto">
<table cellspacing="0" cellpadding="0" border="0" style="font-family:Times New Roman;font-weight:bold;border-collapse:collapse;text-align:left;width:100%;font-size:10pt;margin-bottom:0pt;margin-top:0pt;border:0;">
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<td style="width:10%;vertical-align:top;white-space:nowrap;">Item&#160;5.02</td>
<td style="font-family:Times New Roman;font-weight:bold;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers</td></tr></table> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:6pt">On April&#160;24, 2020, due to the <span style="white-space:nowrap">COVID-19</span> pandemic and the resulting economic disruption, the Board of Directors of Aon plc (the &#8220;Company&#8221;) determined to temporarily reduce the annual base salaries of the Company&#8217;s named executive officers (&#8220;NEOs&#8221;) and the cash compensation of each of the Company&#8217;s <span style="white-space:nowrap">non-executive</span> directors.</p> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">Each of the Company&#8217;s NEOs, Gregory Case, Chief Executive Officer, Christa Davies, Chief Financial Officer, Eric Andersen, President, and John Bruno, Chief Operating Officer, as well as Tony Goland, the Company&#8217;s Chief Innovation Officer, have agreed to a temporary 50% reduction in his or her base salary from May&#160;1, 2020 through December&#160;31, 2020, or until such other date as decided by the Company.</p> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">In addition, each of the Company&#8217;s <span style="white-space:nowrap">non-executive</span> directors has agreed to a temporary 50% reduction in his or her cash compensation from May&#160;1, 2020 through December&#160;31, 2020, or until such other date as decided by the Company.</p> <p style="margin-bottom:0px;margin-top:18pt"></p>
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<td style="width:10%;vertical-align:top;white-space:nowrap;">Item&#160;7.01</td>
<td style="font-family:Times New Roman;font-weight:bold;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">Regulation FD Disclosure</td></tr></table> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:6pt">On April&#160;27, 2020, the Company issued a Message to Colleagues, outlining additional actions being taken by the Company to mitigate the impact of the <span style="white-space:nowrap">COVID-19</span> pandemic on the Company. A copy of the Message to Colleagues is attached hereto as Exhibit 99.1 and is incorporated herein by reference.</p> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">The information in this Item 7.01, including Exhibit 99.1, shall not be deemed to be &#08220;filed&#08221; for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.</p> <p style="margin-bottom:0px;margin-top:18pt"></p>
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<td style="width:10%;vertical-align:top;white-space:nowrap;">Item&#160;9.01</td>
<td style="font-family:Times New Roman;font-weight:bold;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt;">Financial Statements and Exhibits.</td></tr></table> <p style="font-family:Times New Roman;margin-left:0%;text-align:left;text-indent:0%;font-size:10pt;margin-bottom:0px;margin-top:6pt">(d) Exhibits</p>
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<td colspan="2" style="white-space:nowrap;vertical-align:bottom;text-align:center;"> <p style="font-family:Times New Roman;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt">Exhibit</p> <p style="font-family:Times New Roman;text-align:center;font-size:8pt;margin-bottom:0pt;margin-top:0pt;border-bottom:1pt solid #000000;display:inline-block">Number</p></td>
<td style="white-space:nowrap;vertical-align:bottom;padding-right:2pt;margin-bottom:0pt;margin-top:0pt;display:inline-block;">&#160;</td>
<td style="vertical-align:bottom;">&#160;</td>
<td style="white-space:nowrap;vertical-align:bottom;text-align:left;"> <p style="font-family:Times New Roman;text-align:left;font-size:8pt;margin-bottom:0pt;margin-top:0pt;border-bottom:1pt solid #000000;display:inline-block">Description</p></td></tr>
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<td style="white-space:nowrap;vertical-align:top;padding:0;text-align:left"> <p style="font-family:Times New Roman;font-size:10pt;margin-bottom:0pt;margin-top:0pt">104</p></td>
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<td style="vertical-align:top;padding:0;"> <p style="font-family:Times New Roman;margin-left:0.00em;text-align:left;text-indent:0.00em;font-size:10pt;margin-bottom:0pt;margin-top:0pt">Cover Page Interactive Data File (embedded within the Inline XBRL document)</p></td></tr></table> <div></div> <p style="margin-top:1em;margin-bottom:0em"></p></div> <p style='page-break-before:always'></p> <hr style="color:#999999;height:3px;width:100%" /> <div style="font-size:10pt;width:8.5in;margin:0 auto"> <p style="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:10pt;margin-bottom:0pt;margin-top:0pt">SIGNATURES</p> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0px;margin-top:12pt">Pursuant to the requirement 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>
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<td style="vertical-align:top;padding:0;"> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt">Date: April&#160;27, 2020</p></td>
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<td style="vertical-align:top;padding:0;"> <p style="font-family:Times New Roman;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt">Molly Johnson</p></td></tr>
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<td style="vertical-align:top;padding:0;"> <p style="font-family:Times New Roman;font-style:italic;text-align:left;font-size:10pt;margin-bottom:0pt;margin-top:0pt">Assistant Company Secretary</p></td></tr></table> <div></div> <p style="margin-top:1em;margin-bottom:0em"></p></div></body></html>
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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><I>The following is a message Greg Case, Aon CEO, shared with Aon colleagues on Monday, April&nbsp;27, 2020. </I></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Colleagues, </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Over the last two months, as the <FONT
STYLE="white-space:nowrap">COVID-19</FONT> outbreak has spread around the world, we&#146;ve begun a discussion about what its human and economic toll means for our firm. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Throughout this trauma, our team has demonstrated incredible resilience. We all understand the gravity of this crisis and recognize the important role Aon
plays in an increasingly volatile, interconnected and uncertain world. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Which is why we have committed to you that no one at Aon is going to lose their
job because of this <FONT STYLE="white-space:nowrap">COVID-19</FONT> outbreak. Bringing the best of our firm to clients requires every single one of our colleagues and we are committed to an approach that allows all of us to continue supporting that
mission &#150; that&#146;s core to the premise of Aon United. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We also acknowledge that we are experiencing a humanitarian tragedy at a scale that is
difficult to comprehend. While we hold on to glimmers of hope that the worst of the human impact may have passed, the economic consequences are likely to play out for months, or even years to come. Which presents us with difficult decisions in the
near term. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">As we have previously discussed, we have adopted a set of principles to help us navigate this unprecedented global economic lockdown. Guided
by those principles, we are now prepared to share the actions we will take to preserve our operational flexibility and ensure we emerge from this uncertainty a stronger and more capable firm. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">First, I&#146;d like to provide some context on how we have reached our decisions. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Recognizing an unprecedented economic lockdown </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The
global economy is forecasted to shrink by about 3&nbsp;percent for all of 2020<SUP STYLE="font-size:85%; vertical-align:top">1</SUP>, the worst performance in nearly 100 years<SUP STYLE="font-size:85%; vertical-align:top">2</SUP>. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">In Europe, recent reports project 59&nbsp;million jobs affected<SUP STYLE="font-size:85%; vertical-align:top">3</SUP>, with more than a quarter of all private
sector employment in the EU and UK impacted. In Asia, millions are projected to be out of work as China recovers from its first quarter of negative economic growth in over 50 years<SUP STYLE="font-size:85%; vertical-align:top">4</SUP>. In the United
States, some project that nearly one third of American workers &#150; nearly 47&nbsp;million people &#150; could lose their jobs before this crisis ends<SUP STYLE="font-size:85%; vertical-align:top">5</SUP>. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The economic analysis is daunting, but if it were simply a case of marginal revenue declines, we could counter with further expense discipline. Those are
fundamentals that we know how to manage. Unfortunately, this downturn is not that simple. This is an immediate, global lockdown of major segments of our economy. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">In some sectors, organizations have seen nearly all their business disappear in an instant. Airlines have idled most of their fleets. Hotels are all but
empty. Retailers have shuttered their storefronts and resorted to layoffs on a massive scale. Energy companies are pressured as demand plummets. Banks are bracing for a torrent of clients unable to repay debt, with the top 5 U.S. banks alone
expanding their loan loss reserves to five times greater than normal. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">1 </P>

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 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The actions by the banking sector are particularly concerning as they represent a belief that payment
behavior is changing. It&#146;s one thing to reduce marginal expense to match declines in revenue, it&#146;s an entirely different challenge if there are indications that payments will be deferred to an unknown date in the future. Emphasis on
unknown. We simply do not know at what rate or over what time period payment behavior could change. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Taken together, these trends point to a significant
and sustained economic downturn. It&#146;s possible that we&#146;re wrong about the gathering financial storm, but our analysis tells us that we need to act and that presents us with a choice: do we eliminate jobs, or do we find an alternative that
protects our colleagues and serves our clients? </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Taking action from a position of strength </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We have chosen to take actions that protect jobs and preserve our ability to best serve our clients and are privileged to do so from a position of exceptional
financial strength: </P> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our Aon United growth strategy, refined over a decade, is working and has increased revenue and expanded
operating margins, allowing us to reshape our portfolio to address emerging client needs. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our Aon United Blueprint, provides us greater clarity about how we bring the best of our firm to clients through
our Delivering Aon United game plan. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our investments in Aon Business Services have allowed our firm to adapt quickly to the current environment and
manage our expenses with better pace and precision. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
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<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our services are largely <FONT STYLE="white-space:nowrap">non-discretionary,</FONT> and we enjoy a 95%+ retention
rate. </P></TD></TR></TABLE> <P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our combination with Willis Towers Watson will be a positive catalyst that enables us to accelerate innovation on
behalf of clients. This <FONT STYLE="white-space:nowrap">all-stock</FONT> combination requires no financing and our intent to complete it creates no incremental financial burden. </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TR style = "page-break-inside:avoid">
<TD WIDTH="5%">&nbsp;</TD>
<TD WIDTH="3%" VALIGN="top" ALIGN="left">&#149;</TD>
<TD WIDTH="1%" VALIGN="top">&nbsp;</TD>
<TD ALIGN="left" VALIGN="top"> <P ALIGN="left" STYLE=" margin-top:0pt ; margin-bottom:0pt; font-family:Times New Roman; font-size:10pt">Our cash position is strong, reinforced by an investment-grade balance sheet and a thoughtfully managed and
staggered debt portfolio which insulates us from the accumulation of debt maturities at any one time. </P></TD></TR></TABLE> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">While we have reason to be
encouraged, even hopeful, we also must be clear-eyed about the uncertainty we face and take action now. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>A principles-based approach to protecting
colleagues </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">As we have discussed over the past month, we have adopted a set of principles to guide our actions: </P>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="5%" VALIGN="top" ALIGN="left">1.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><U>Our priority will be our colleagues, clients, and our firm.</U> We will always look to protect our
colleagues&#146; needs. Our value to clients stems fully from the collective capabilities of our colleagues. The concerns of all other stakeholders are important, but secondary at this time. </P></TD></TR></TABLE>
<P STYLE="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
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<TD WIDTH="4%">&nbsp;</TD>
<TD WIDTH="5%" VALIGN="top" ALIGN="left">2.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><U>We will be sober in our assessment of the landscape.</U> We recognize the extraordinarily fluid nature of
the business landscape and will continue to make swift decisions that protect our operational flexibility. We will not take a &#147;wait and see&#148; approach to the future of our firm. </P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">2 </P>

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<TD WIDTH="5%" VALIGN="top" ALIGN="left">3.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left"><U>We will focus on the things we can control.</U> This is the hand we have all been dealt. No amount of
complaining about it or comparing our approach to others will change the fact set. We own our destiny and we wouldn&#146;t want it any other way. </P></TD></TR></TABLE>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Preserving operational flexibility </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Consistent with our
principles, our first actions have been focused on opportunities that do not have a direct, personal impact on individual colleagues. We have already substantially curtailed spending on contractors and third-party vendors and are now asking our Aon
Business Services team to take additional steps. They are mobilizing a monumental firm-wide effort to reduce all discretionary expense not related to client service. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We have also paused our stock buyback plan and set aside those funds. It&#146;s important to note that we intend to preserve our dividend. Paying a regular
dividend is consistent with maintaining an investment grade rating and fundamental to accessing the capital markets. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">As we assess the economic risks on
the horizon, we do not believe that these actions alone are enough to provide the operational flexibility we may require. That&#146;s why we are also asking colleagues across the firm to support us during this time with temporary compensation
reductions. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Our Named Executive Officers (NEOs), including me, Christa Davies, Eric Andersen, John Bruno and Tony Goland, as well as our Board of
Directors, will reduce salaries by 50&nbsp;percent. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We have worked with local leaders around the world to determine the most equitable way to apply a
temporary salary reduction to our broader colleague base and have developed a tailored approach based on a set of criteria, including the <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">cost-of-living.</FONT></FONT> </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Based on that analysis, we have set a floor in each country. This means that approximately 30% of our colleagues will see no reduction. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We are working with local leaders and planning for the remaining 70% of our colleagues to take a reduction of approximately 20% of salary, which will be
implemented in accordance with local practices. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">These actions, which will begin to take effect May&nbsp;1, were developed in collaboration with the Aon
Operating Committee. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Our objective is that everyone emerges from this challenging period in as good a place as possible; unfortunately, it is too early
in this economic crisis to determine how we ultimately mitigate these actions. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Our commitment is that we will act with integrity to protect our
colleagues and our firm. We will continue to apply our principles-based approach to how we manage through this crisis and review these actions monthly. </P>
<P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Emerging a stronger and more capable firm </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">There is no
question that it would be easier to wait and see how significant the coming economic downturn will be, but that puts the future of our firm at risk. Some might argue it would simply be easier to <FONT STYLE="white-space:nowrap">lay-off</FONT> a
subset of our colleagues, but that would put our ability to serve clients at risk. </P>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">3 </P>

</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always">
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">


<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We are taking a more complex and difficult step because we believe that all of us are critical to delivering
on the full potential of Aon. At a time when our clients need us most, we need the full force of Aon United behind them. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">We have spent the last month
carefully studying our options and know these proactive steps are the right decision for our firm. We are going on offense to both protect our firm and prepare for the opportunity that lays ahead. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Because as much as these actions reflect a principled decision consistent with our values, it is also a business decision based squarely on client need. We
are witnessing a global shift in client priorities not seen in recent history and we must be ready to answer that call. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">For that reason, we expect to
emerge from this crisis a stronger and more capable firm that is essential to our client&#146;s success and best positioned to capitalize on that opportunity. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Thank you for your support, your dedication and all that you are doing for our firm. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Be safe and stay Aon United. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Best, </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Greg </P> <P STYLE="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">1</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">International Monetary Fund: <U>World Economic Outlook</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">2</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">IMF Blog: <U>The Great Lockdown Worst Economic Downturn Since the Great Depression</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">3</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">ABS News/McKinsey: <U>Up to 59&nbsp;million jobs at risk as European countries look to ease coronavirus
lockdown measures</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">4.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">National Bureau of Statistics of China: <U>Decline of Major Economic Indicators Significantly Narrowed Down in
March</U> </P></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR style = "page-break-inside:avoid">
<TD WIDTH="4%" VALIGN="top" ALIGN="left">5.</TD>
<TD ALIGN="left" VALIGN="top"> <P STYLE=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman; " ALIGN="left">CNBC: <U>Coronavirus Job Losses Could Total 47 Million Unemployment Rate of 32&nbsp;percent Fed Says</U>
</P></TD></TR></TABLE>
 <p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P> <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center">4 </P>

</DIV></Center>

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    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="aon_DocumentAndEntityInformationTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="23" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain_2" order="23.0001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassAMember" order="24" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member" order="25" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member" order="26" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member" order="27" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member" order="28" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member" order="29" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs4.250PercentSeniorNotesDue2042Member" order="30" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs4.450PercentSeniorNotesDue2043Member" order="31" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs4.600PercentSeniorNotesDue2044Member" order="32" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="aon_GuaranteesOfAonPlcs4.750PercentSeniorNotesDue2045Member" order="33" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityTaxIdentificationNumber" order="33.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_AmendmentFlag" order="34.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityCentralIndexKey" order="35.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_DocumentType" order="47.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" order="48.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityRegistrantName" order="49.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" order="50.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityFileNumber" order="51.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityAddressAddressLine1" order="52.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityAddressCityOrTown" order="53.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityAddressCountry" order="54.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityAddressPostalZipCode" order="55.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_CityAreaCode" order="56.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_LocalPhoneNumber" order="57.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_WrittenCommunications" order="58.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_SolicitingMaterial" order="59.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_PreCommencementTenderOffer" order="60.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_PreCommencementIssuerTenderOffer" order="61.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_Security12bTitle" order="62.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_TradingSymbol" order="63.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_SecurityExchangeName" order="64.001" priority="2" use="optional" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="aon_DocumentAndEntityInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" order="65.001" priority="2" use="optional" />
  </link:definitionLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>5
<FILENAME>aon-20200424_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: 64.2.3 -->
<!-- Creation date: 4/27/2020 2:53:16 AM Eastern Time -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:type="locator" xlink:label="us-gaap_StatementClassOfStockAxis" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:type="locator" xlink:label="us-gaap_ClassOfStockDomain" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_ClassOfStockDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCountry" xlink:type="locator" xlink:label="dei_EntityAddressCountry" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCountry" xlink:to="dei_EntityAddressCountry_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCountry_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Country</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCountry_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Country</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>6
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<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
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<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
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<td class="text">Class A Ordinary Shares, $0.01 nominal value<span></span>
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<td class="text">Guarantees of Aon plc&#8217;s 2.800% Senior Notes due 2021<span></span>
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<td class="text">Guarantees of Aon plc&#8217;s 4.000% Senior Notes due 2023<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
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<td class="text">Guarantees of Aon plc&#8217;s 3.500% Senior Notes due 2024<span></span>
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<td class="text">Guarantees of Aon plc&#8217;s 2.875% Senior Notes due 2026<span></span>
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<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_aon_DocumentAndEntityInformationLineItems', window );"><strong>Document And Entity Information [Line Items]</strong></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="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Guarantees of Aon plc&#8217;s 4.250% Senior Notes due 2042<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">AON42<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.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="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=aon_GuaranteesOfAonPlcs4.450PercentSeniorNotesDue2043Member', window );">Guarantees of Aon plc&#8217;s 4.450% Senior Notes due 2043 [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="top.Show.showAR( this, 'defref_aon_DocumentAndEntityInformationLineItems', window );"><strong>Document And Entity Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Guarantees of Aon plc&#8217;s 4.450% Senior Notes due 2043<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">AON43<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.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="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=aon_GuaranteesOfAonPlcs4.600PercentSeniorNotesDue2044Member', window );">Guarantees of Aon plc&#8217;s 4.600% Senior Notes due 2044 [Member]</a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_aon_DocumentAndEntityInformationLineItems', window );"><strong>Document And Entity Information [Line Items]</strong></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="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Guarantees of Aon plc&#8217;s 4.600% Senior Notes due 2044<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">AON44<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.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="top.Show.showAR( this, 'defref_us-gaap_StatementClassOfStockAxis=aon_GuaranteesOfAonPlcs4.750PercentSeniorNotesDue2045Member', window );">Guarantees of Aon plc&#8217;s 4.750% Senior Notes due 2045 [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="top.Show.showAR( this, 'defref_aon_DocumentAndEntityInformationLineItems', window );"><strong>Document And Entity Information [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Guarantees of Aon plc&#8217;s 4.750% Senior Notes due 2045<span></span>
</td>
</tr>
<tr class="re">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">AON45<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl " style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="top.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_aon_DocumentAndEntityInformationLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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;">aon_DocumentAndEntityInformationLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>aon_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</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_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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_EntityAddressCountry">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>ISO 3166-1 alpha-2 country code.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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_EntityAddressCountry</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:countryCodeItemType</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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation 12B<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.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="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.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="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.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="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.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> -Section 14a<br> -Number 240<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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="top.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="top.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="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs2.800PercentSeniorNotesDue2021Member</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=aon_GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs4.000PercentSeniorNotesDue2023Member</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=aon_GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs3.500PercentSeniorNotesDue2024Member</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=aon_GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs3.875PercentSeniorNotesDue2025Member</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=aon_GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="top.Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="top.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=aon_GuaranteesOfAonPlcs2.875PercentSeniorNotesDue2026Member</td>
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end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>15
<FILENAME>0001193125-20-120011-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
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"   !

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
