Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Data (Unaudited)

Quarterly Financial Data

   Selected quarterly financial data for the years ended December 31, 2012 and 2011 as follows (in millions, except per share data):

	1Q		2Q		3Q		4Q		2012
INCOME STATEMENT DATA
Commissions, fees and other revenue	$	2,829	$	2,813	$	2,726	$	3,108	$	11,476
Fiduciary investment income		12		8		11		7		38
Total revenue	$	2,841	$	2,821	$	2,737	$	3,115	$	11,514
Operating income	$	402	$	394	$	339	$	461	$	1,596
Income from continuing operations	$	249	$	255	$	210	$	307	$	1,021
Loss from discontinued operations		—		1		—		—		1
Net income		249		254		210		307		1,020
Less: Net income attributable to noncontrolling interests		11		8		6		2		27
Net income attributable to Aon shareholders	$	238	$	246	$	204	$	305	$	993
PER SHARE DATA
Basic:
Income from continuing operations	$	0.72	$	0.74	$	0.62	$	0.95	$	3.03
Loss from discontinued operations		—		—		—		—		—
Net income	$	0.72	$	0.74	$	0.62	$	0.95	$	3.03
Diluted:
Income from continuing operations	$	0.71	$	0.73	$	0.62	$	0.93	$	2.99
Loss from discontinued operations		—		—		—		—		—
Net income	$	0.71	$	0.73	$	0.62	$	0.93	$	2.99
CLASS A ORDINARY SHARE DATA
Dividends paid per share	$	0.15	$	0.16	$	0.16	$	0.16	$	0.62
Price range:
High	$	49.51	$	52.61	$	53.35	$	57.92	$	57.92
Low	$	45.58	$	45.04	$	45.87	$	51.78	$	45.04
Shares outstanding		326.4		322.4		318.7		310.9		310.9
Average monthly trading volume		47.0		47.6		30.1		33.7		39.6

	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	$	398	$	440	$	328	$	430	$	1,596
Income from continuing operations	$	253	$	265	$	208	$	280	$	1,006
Income 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 shareholders	$	246	$	258	$	198	$	277	$	979
PER SHARE DATA
Basic:
Income from continuing operations	$	0.72	$	0.76	$	0.59	$	0.84	$	2.91
Income 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
Income from discontinued operations		—		—		—	$	0.01		0.01
Net income	$	0.71	$	0.75	$	0.59	$	0.83	$	2.87
CLASS A ORDINARY SHARE 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		50.7		40.2		55.3		56.3		50.6