Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data (Unaudited)

Quarterly Financial Data

	1Q		2Q		3Q		4Q		2011
INCOME STATEMENT DATA
Commissions, fees and other revenue	$	2,748	$	2,799	$	2,708	$	2,980	$	11,235
Fiduciary investment income		11		12		15		14		52
Total revenue	$	2,759	$	2,811	$	2,723	$	2,994	$	11,287
Operating income	$	396	$	434	$	341	$	435	$	1,606
Income from continuing operations	$	253	$	265	$	208	$	280	$	1,006
Loss from discontinued operations		2		2		—		—		4
Net income		255		267		208		280		1,010
Less: Net income attributable to noncontrolling interests		9		9		10		3		31
Net income attributable to Aon stockholders	$	246	$	258	$	198	$	277	$	979
PER SHARE DATA
Basic:
Income from continuing operations	$	0.72	$	0.76	$	0.59	$	0.84	$	2.91
Loss from discontinued operations		—		—		—	$	0.01	$	0.01
Net income	$	0.72	$	0.76	$	0.59	$	0.85	$	2.92
Diluted:
Income from continuing operations	$	0.71	$	0.75	$	0.59	$	0.82	$	2.86
Loss from discontinued operations		—		—		—	$	0.01		0.01
Net income	$	0.71	$	0.75	$	0.59	$	0.83	$	2.87
COMMON STOCK DATA
Dividends paid per share	$	0.15	$	0.15	$	0.15	$	0.15	$	0.60
Price range:
High	$	53.17	$	54.58	$	52.17	$	51.11	$	54.58
Low	$	43.31	$	48.66	$	39.68	$	39.90	$	39.68
Shares outstanding		330.5		326.7		323.3		324.4		324.4
Average monthly trading volume		—		—		—		—		—

	1Q		2Q			3Q		4Q			2010
INCOME STATEMENT DATA
Commissions, fees and other revenue	$	1,891	$	1,883		$	1,786	$	2,897		$	8,457
Fiduciary investment income		13		15			15		12			55
Total revenue	$	1,904	$	1,898		$	1,801	$	2,909		$	8,512
Operating income	$	273	$	268		$	263	$	422		$	1,226
Income from continuing operations	$	186	$	184		$	147	$	242		$	759
Loss from discontinued operations		—		(26	)		—		(1	)		(27	)
Net income		186		158			147		241			732
Less: Net income attributable to noncontrolling interests		8		5			3		10			26
Net income attributable to Aon stockholders	$	178	$	153		$	144	$	231		$	706
PER SHARE DATA
Basic:
Income from continuing operations	$	0.65	$	0.64		$	0.52	$	0.68		$	2.50
Loss from discontinued operations		—		(0.09	)		—		—			(0.09	)
Net income	$	0.65	$	0.55		$	0.52	$	0.68		$	2.41
Diluted:
Income from continuing operations	$	0.63	$	0.63		$	0.51	$	0.67		$	2.46
Loss from discontinued operations		—		(0.09	)		—		—			(0.09	)
Net income	$	0.63	$	0.54		$	0.51	$	0.67		$	2.37
COMMON STOCK DATA
Dividends paid per share	$	0.15	$	0.15		$	0.15	$	0.15		$	0.60
Price range:
High	$	43.16	$	44.34		$	40.08	$	46.24		$	46.24
Low	$	37.33	$	37.06		$	35.10	$	38.72		$	35.10
Shares outstanding		269.4		269.7			270.9		332.3			332.3
Average monthly trading volume		37.2		38.7			80.3		54.4			52.7