Guarantee of Registered Securities (Tables)

6 Months Ended

Jun. 30, 2016

Guarantee of Registered Securities [Abstract]

Condensed Consolidating Statements of Income

Condensed Consolidating Statement of Income

	Three months ended June 30, 2016
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	2,761		$	—		$	2,761
Fiduciary investment income	—			—			5			—			5
Total revenue	—			—			2,766			—			2,766
Expenses
Compensation and benefits	8			3			1,677			—			1,688
Other general expenses	(1		)	2			672			—			673
Total operating expenses	7			5			2,349			—			2,361
Operating (loss) income	(7		)	(5		)	417			—			405
Interest income	—			4			5			(6		)	3
Interest expense	(49		)	(26		)	(4		)	6			(73		)
Intercompany interest income (expense)	3			(137		)	134			—			—
Intercompany other (expense) income	(57		)	(16		)	73			—			—
Other income (loss)	2			(4		)	6			(4		)	—
(Loss) income before taxes	(108		)	(184		)	631			(4		)	335
Income tax (benefit) expense	(21		)	(64		)	140			—			55
(Loss) income before equity in earnings of subsidiaries	(87		)	(120		)	491			(4		)	280
Equity in earnings of subsidiaries, net of tax	363			236			116			(715		)	—
Net income	276			116			607			(719		)	280
Less: Net income attributable to noncontrolling interests	—			—			8			—			8
Net income attributable to Aon shareholders	$	276		$	116		$	599		$	(719	)	$	272

Condensed Consolidating Statement of Income

	Three months ended June 30, 2015
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	2,800		$	—		$	2,800
Fiduciary investment income	—			—			5			—			5
Total revenue	—			—			2,805			—			2,805
Expenses
Compensation and benefits	5			10			1,638			—			1,653
Other general expenses	(4		)	2			877			—			875
Total operating expenses	1			12			2,515			—			2,528
Operating (loss) income	(1		)	(12		)	290			—			277
Interest income	(5		)	4			5			—			4
Interest expense	(29		)	(33		)	(6		)	—			(68		)
Intercompany interest income (expense)	119			(116		)	(3		)	—			—
Intercompany other (expense) income	(56		)	(15		)	71			—			—
Other income	(1		)	—			2			—			1
Income (loss) before taxes	27			(172		)	359			—			214
Income tax expense (benefit)	6			(66		)	86			—			26
Income (loss) before equity in earnings of subsidiaries	21			(106		)	273			—			188
Equity in earnings of subsidiaries, net of tax	157			170			64			(391		)	—
Net income	178			64			337			(391		)	188
Less: Net income attributable to noncontrolling interests	—			—			10			—			10
Net income attributable to Aon shareholders	$	178		$	64		$	327		$	(391	)	$	178

Condensed Consolidating Statement of Income

	Six months ended June 30, 2016
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	5,548		$	—		$	5,548
Fiduciary investment income	—			—			10			—			10
Total revenue	—			—			5,558			—			5,558
Expenses
Compensation and benefits	51			6			3,280			—			3,337
Other general expenses	6			4			1,356			—			1,366
Total operating expenses	57			10			4,636			—			4,703
Operating (loss) income	(57		)	(10		)	922			—			855
Interest income	—			9			9			(13		)	5
Interest expense	(94		)	(54		)	(7		)	13			(142		)
Intercompany interest income (expense)	7			(270		)	263			—			—
Intercompany other (expense) income	(111		)	(15		)	126			—			—
Other income	2			(9		)	29			(4		)	18
(Loss) income before taxes	(253		)	(349		)	1,342			(4		)	736
Income tax (benefit) expense	(47		)	(126		)	302			—			129
(Loss) income before equity in earnings of subsidiaries	(206		)	(223		)	1,040			(4		)	607
Equity in earnings of subsidiaries, net of tax	797			603			380			(1,780		)	—
Net income	591			380			1,420			(1,784		)	607
Less: Net income attributable to noncontrolling interests	—			—			20			—			20
Net income attributable to Aon shareholders	$	591		$	380		$	1,400		$	(1,784	)	$	587

Condensed Consolidating Statement of Income

	Six months ended June 30, 2015
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Revenue
Commissions, fees and other	$	—		$	—		$	5,642		$	—		$	5,642
Fiduciary investment income	—			—			10			—			10
Total revenue	—			—			5,652			—			5,652
Expenses
Compensation and benefits	57			21			3,258			—			3,336
Other general expenses	9			4			1,585			—			1,598
Total operating expenses	66			25			4,843			—			4,934
Operating (loss) income	(66		)	(25		)	809			—			718
Interest income	(9		)	7			9			—			7
Interest expense	(54		)	(68		)	(11		)	—			(133		)
Intercompany interest income (expense)	239			(221		)	(18		)	—			—
Intercompany other (expense) income	(106		)	(23		)	129			—			—
Other income	1			8			34			—			43
Income (loss) before taxes	5			(322		)	952			—			635
Income tax expense (benefit)	1			(117		)	222			—			106
Income (loss) before equity in earnings of subsidiaries	4			(205		)	730			—			529
Equity in earnings of subsidiaries, net of tax	502			571			366			(1,439		)	—
Net income	506			366			1,096			(1,439		)	529
Less: Net income attributable to noncontrolling interests	—			—			23			—			23
Net income attributable to Aon shareholders	$	506		$	366		$	1,073		$	(1,439	)	$	506

Condensed Consolidating Statements of Comprehensive Income

Condensed Consolidating Statement of Comprehensive Income

	Three months ended June 30, 2016
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Net income	$	276		$	116		$	607		$	(719	)	$	280
Less: Net income attributable to noncontrolling interests	—			—			8			—			8
Net income attributable to Aon shareholders	$	276		$	116		$	599		$	(719	)	$	272
Other comprehensive (loss) income, net of tax:
Change in fair value of financial instruments	—			2			(6		)	—			(4		)
Foreign currency translation adjustments	(2		)	10			(71		)	4			(59		)
Post-retirement benefit obligation	—			3			48			—			51
Total other comprehensive loss	(2		)	15			(29		)	4			(12		)
Equity in other comprehensive loss of subsidiaries, net of tax	(14		)	(31		)	(16		)	61			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			—			—			—
Total other comprehensive loss attributable to Aon shareholders	(16		)	(16		)	(45		)	65			(12		)
Comprehensive income attributable to Aon shareholders	$	260		$	100		$	554		$	(654	)	$	260

Condensed Consolidating Statement of Comprehensive Income

	Three months ended June 30, 2015
					Other
	Aon		Aon		Non-Guarantor			Consolidating
(millions)	plc		Corporation		Subsidiaries			Adjustments			Consolidated
Net income	$	178	$	64	$	337		$	(391	)	$	188
Less: Net income attributable to noncontrolling interests	—		—		10			—			10
Net income attributable to Aon shareholders	$	178	$	64	$	327		$	(391	)	$	178
Other comprehensive income (loss), net of tax:
Change in fair value of financial instruments	—		2		(8		)	—			(6		)
Foreign currency translation adjustments	—		4		171			—			175
Post-retirement benefit obligation	—		9		12			—			21
Total other comprehensive (loss) income	—		15		175			—			190
Equity in other comprehensive income of subsidiaries, net of tax	191		173		188			(552		)	—
Less: Other comprehensive income attributable to noncontrolling interests	—		—		(1		)	—			(1		)
Total other comprehensive income attributable to Aon shareholders	191		188		364			(552		)	191
Comprehensive income attributable to Aon Shareholders	$	369	$	252	$	691		$	(943	)	$	369

Condensed Consolidating Statement of Comprehensive Income

	Six months ended June 30, 2016
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Net income	$	591		$	380		$	1,420		$	(1,784	)	$	607
Less: Net income attributable to noncontrolling interests	—			—			20			—			20
Net income attributable to Aon shareholders	$	591		$	380		$	1,400		$	(1,784	)	$	587
Other comprehensive (loss) income, net of tax:
Change in fair value of financial instruments	—			—			(11		)	—			(11		)
Foreign currency translation adjustments	(2		)	21			(161		)	4			(138		)
Post-retirement benefit obligation	—			16			(166		)	—			(150		)
Total other comprehensive loss	(2		)	37			(338		)	4			(299		)
Equity in other comprehensive loss of subsidiaries, net of tax	(301		)	(345		)	(308		)	954			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			—			—			—
Total other comprehensive loss attributable to Aon shareholders	(303		)	(308		)	(646		)	958			(299		)
Comprehensive income attributable to Aon shareholders	$	288		$	72		$	754		$	(826	)	$	288

Condensed Consolidating Statement of Comprehensive Income

	Six months ended June 30, 2015
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
Net income	$	506		$	366		$	1,096		$	(1,439	)	$	529
Less: Net income attributable to noncontrolling interests	—			—			23			—			23
Net income attributable to Aon shareholders	$	506		$	366		$	1,073		$	(1,439	)	$	506
Other comprehensive income (loss), net of tax:
Change in fair value of financial instruments	—			1			(2		)	—			(1		)
Foreign currency translation adjustments	—			(19		)	(128		)	—			(147		)
Post-retirement benefit obligation	—			17			27			—			44
Total other comprehensive (loss) income	—			(1		)	(103		)	—			(104		)
Equity in other comprehensive income of subsidiaries, net of tax	(102		)	(94		)	(95		)	291			—
Less: Other comprehensive income attributable to noncontrolling interests	—			—			(2		)	—			(2		)
Total other comprehensive income attributable to Aon shareholders	(102		)	(95		)	(196		)	291			(102		)
Comprehensive income attributable to Aon Shareholders	$	404		$	271		$	877		$	(1,148	)	$	404

Condensed Consolidating Statements of Financial Position

Condensed Consolidating Statement of Financial Position

	As of June 30, 2016
					Other
	Aon		Aon		Non-Guarantor		Consolidating
(millions)	plc		Corporation		Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	—	$	1,349	$	1,850	$	(2,761	)	$	438
Short-term investments	—		118		133		—			251
Receivables, net	—		1		2,515		—			2,516
Fiduciary assets	—		—		10,201		—			10,201
Intercompany receivables	55		4,847		9,436		(14,338		)	—
Other current assets	—		24		371		—			395
Total Current Assets	55		6,339		24,506		(17,099		)	13,801
Goodwill	—		—		8,473		—			8,473
Intangible assets, net	—		—		2,107		—			2,107
Fixed assets, net	—		—		751		—			751
Non-current deferred tax assets	154		746		176		(811		)	265
Intercompany receivables	378		262		8,711		(9,351		)	—
Prepaid pension	—		6		714		—			720
Other non-current assets	—		111		465		—			576
Investment in subsidiary	12,315		16,914		277		(29,506		)	—
TOTAL ASSETS	$	12,902	$	24,378	$	46,180	$	(56,767	)	$	26,693
LIABILITIES AND EQUITY
Accounts payable and accrued liabilities	$	2,803	$	45	$	1,286	$	(2,761	)	$	1,373
Short-term debt and current portion of long-term debt	241		—		10		—			251
Fiduciary liabilities	—		—		10,201		—			10,201
Intercompany payables	147		12,357		1,834		(14,338		)	—
Other current liabilities	1		60		811		—			872
Total Current Liabilities	3,192		12,462		14,142		(17,099		)	12,697
Long-term debt	4,205		1,413		289		—			5,907
Non-current deferred tax liabilities	—		—		850		(811		)	39
Pension, other post-retirement and other post-employment liabilities	—		1,284		438		—			1,722
Intercompany payables	—		8,878		473		(9,351		)	—
Other non-current liabilities	6		64		697		—			767
TOTAL LIABILITIES	7,403		24,101		16,889		(27,261		)	21,132
TOTAL AON SHAREHOLDERS' EQUITY	5,499		277		29,229		(29,506		)	5,499
Noncontrolling interests	—		—		62		—			62
TOTAL EQUITY	5,499		277		29,291		(29,506		)	5,561
TOTAL LIABILITIES AND EQUITY	$	12,902	$	24,378	$	46,180	$	(56,767	)	$	26,693

Condensed Consolidating Statement of Financial Position

	As of December 31, 2015
					Other
	Aon		Aon		Non-Guarantor		Consolidating
(millions)	plc		Corporation		Subsidiaries		Adjustments			Consolidated
ASSETS
Cash and cash equivalents	$	—	$	2,083	$	1,242	$	(2,941	)	$	384
Short-term investments	—		209		147		—			356
Receivables, net	1		—		2,733		—			2,734
Fiduciary assets	—		—		9,932		—			9,932
Intercompany receivables	432		1,950		7,957		(10,339		)	—
Other current assets	—		19		310		—			329
Total Current Assets	433		4,261		22,321		(13,280		)	13,735
Goodwill	—		—		8,448		—			8,448
Intangible assets, net	—		—		2,180		—			2,180
Fixed assets, net	—		—		765		—			765
Intercompany receivables	375		526		8,633		(9,534		)	—
Non-current deferred tax assets	154		756		141		(817		)	234
Prepaid pension	—		6		1,027		—			1,033
Other non-current assets	—		119		557		(84		)	592
Investment in subsidiary	11,804		16,534		369		(28,707		)	—
TOTAL ASSETS	$	12,766	$	22,202	$	44,441	$	(52,422	)	$	26,987
LIABILITIES AND EQUITY
Accounts payable and accrued liabilities	$	2,988	$	45	$	1,680	$	(2,941	)	$	1,772
Short-term debt and current portion of long-term debt	—		550		12		—			562
Fiduciary liabilities	—		—		9,932		—			9,932
Intercompany payables	167		9,518		654		(10,339		)	—
Other current liabilities	47		56		716		—			819
Total Current Liabilities	3,202		10,169		12,994		(13,280		)	13,085
Long-term debt	3,451		1,412		275		—			5,138
Non-current deferred tax liabilities	—		—		855		(818		)	37
Pension, other post-retirement and other post-employment liabilities	—		1,313		482		—			1,795
Intercompany payables	—		8,799		735		(9,534		)	—
Other non-current liabilities	7		140		705		(83		)	769
TOTAL LIABILITIES	6,660		21,833		16,046		(23,715		)	20,824
TOTAL AON SHAREHOLDERS' EQUITY	6,106		369		28,338		(28,707		)	6,106
Noncontrolling interests	—		—		57		—			57
TOTAL EQUITY	6,106		369		28,395		(28,707		)	6,163
TOTAL LIABILITIES AND EQUITY	$	12,766	$	22,202	$	44,441	$	(52,422	)	$	26,987

Condensed Consolidating Statements of Cash Flows

Condensed Consolidating Statement of Cash Flows

	Six months ended June 30, 2016
	Aon			Aon			Other Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES	$	237		$	(625	)	$	1,156		$	(4	)	$	764
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from investments	—			14			9			—			23
Purchases of investments	—			(13		)	(16		)	—			(29		)
Net (purchases) sales of short-term investments - non-fiduciary	—			92			14			—			106
Acquisition of businesses, net of cash acquired	—			—			(183		)	—			(183		)
Proceeds from sale of businesses	—			—			103			—			103
Capital expenditures	—			—			(104		)	—			(104		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	—			93			(177		)	—			(84		)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(750		)	—			—			—			(750		)
Advances from (to) affiliates	(211		)	348			(321		)	184			—
Issuance of shares for employee benefit plans	(87		)	—			—			—			(87		)
Issuance of debt	1,239			817			—			—			2,056
Repayment of debt	(259		)	(1,367		)	(6		)	—			(1,632		)
Cash dividends to shareholders	(169		)	—			—			—			(169		)
Noncontrolling interests and other financing activities	—			—			(62		)	—			(62		)
CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES	(237		)	(202		)	(389		)	184			(644		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			18			—			18
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	—			(734		)	608			180			54
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—			2,083			1,242			(2,941		)	384
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	—		$	1,349		$	1,850		$	(2,761	)	$	438

Condensed Consolidating Statement of Cash Flows

	Six months ended June 30, 2015
							Other
	Aon			Aon			Non-Guarantor			Consolidating
(millions)	plc			Corporation			Subsidiaries			Adjustments			Consolidated
CASH FLOWS FROM OPERATING ACTIVITIES
CASH PROVIDED BY (USED FOR) OPERATING ACTIVITIES	$	93		$	(368	)	$	853		$	—		$	578
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from investments	—			—			10			—			10
Purchases of investments	—			(1		)	—			—			(1		)
Net (purchases) sales of short-term investments - non-fiduciary	—			41			(138		)	—			(97		)
Acquisition of businesses, net of cash acquired	—			—			(23		)	—			(23		)
Proceeds from sale of businesses	—			—			52			—			52
Capital expenditures	—			—			(142		)	—			(142		)
CASH PROVIDED BY (USED FOR) INVESTING ACTIVITIES	—			40			(241		)	—			(201		)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(550		)	—			—			—			(550		)
Advances from (to) affiliates	172			(134		)	(1,191		)	1,153			—
Issuance of shares for employee benefit plans	(161		)	—			—			—			(161		)
Issuance of debt	712			1,732			1			—			2,445
Repayment of debt	(110		)	(1,776		)	(10		)	—			(1,896		)
Cash dividends to shareholders	(156		)	—			—			—			(156		)
Noncontrolling interests and other financing activities	—			—			(23		)	—			(23		)
CASH (USED FOR) PROVIDED BY FINANCING ACTIVITIES	(93		)	(178		)	(1,223		)	1,153			(341		)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	—			—			(43		)	—			(43		)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	—			(506		)	(654		)	1,153			(7		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	—			2,727			1,361			(3,714		)	374
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	—		$	2,221		$	707		$	(2,561	)	$	367