Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Stockholders' Equity

Schedule disclosing shares of participating securities in earnings

	Three months ended September 30,				Nine months ended September 30,
	2011		2010		2011		2010
Income from continuing operations	$	3	$	3	$	11	$	11
Income (loss) from discontinued operations	—		—		—		(1		)
Net income	$	3	$	3	$	11	$	10

Schedule disclosing components of weighted average number of shares

	Three months ended September 30,		Nine months ended September 30,
	2011	2010	2011	2010
Shares for basic earnings per share (1)	332.6	278.7	336.7	277.6
Common stock equivalents	4.3	3.5	5.1	4.3
Shares for diluted earnings per share	336.9	282.2	341.8	281.9

(1)  Includes 5.2 million and 5.8 million of participating securities for the three months ended September 30, 2011 and 2010, respectively, and 5.5 million and 6.1 million of participating securities for the nine months ended September 30, 2011 and 2010, respectively.

Components of other comprehensive income (loss), net of related tax

	Three months ended September 30,					Nine months ended September 30,
	2011			2010		2011			2010
Net change in derivative (losses) gains	(9		)	2		(14		)	(24		)
Net foreign currency translation adjustments	(209		)	207		(12		)	(66		)
Net post-retirement benefit obligations	15			13		42			68
Total other comprehensive (loss) income	(203		)	222		16			(22		)
Less: other comprehensive (loss) income attributable to noncontrolling interests	(1		)	5		(1		)	16
Other comprehensive (loss) income attributable to Aon stockholders	$	(202	)	$	217	$	17		$	(38	)

Components of accumulated other comprehensive loss, net of related tax

	September 30, 2011			December 31, 2010
Net derivative losses	$	(38	)	$	(24	)
Net foreign currency translation adjustments	157			168
Net post-retirement benefit obligations	(2,019		)	(2,061		)
Accumulated other comprehensive loss, net of tax	$	(1,900	)	$	(1,917	)