Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets

Schedule of changes in the net carrying amount of goodwill by operating segment

	Risk Solutions			HR Solutions			Total
Balance as of January 1, 2010		5,693			385			6,078
Goodwill related to Hewitt acquisition		—			2,715			2,715
Goodwill related to other acquisitions		50			9			59
Goodwill related to disposals		(2	)		—			(2	)
Foreign currency revaluation		(192	)		(11	)		(203	)
Balance as of December 31, 2010	$	5,549		$	3,098		$	8,647
Goodwill related to acquisitions		73			4			77
Goodwill related to disposals		(2	)		—			(2	)
Goodwill related to Hewitt acquisition		—			50			50
Goodwill related to other prior year acquisitions		—			1			1
Transfers		(83	)		83			—
Foreign currency revaluation		20			(23	)		(3	)
Balance as of December 31, 2011	$	5,557		$	3,213		$	8,770

Schedule of other intangible assets by asset class

	As of December 31
	2011						2010
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Trademarks	$	1,024	$	—	$	1,024	$	1,024	$	—	$	1,024
												—
Intangible assets with finite lives:												—
Trademarks		4		1		3		3		—		3
Customer related and contract based		2,608		615		1,993		2,605		344		2,261
Marketing, technology and other		606		350		256		606		283		323
	$	4,242	$	966	$	3,276	$	4,238	$	627	$	3,611

Schedule of estimated future amortization expense on intangible assets

	HR Solutions		Risk Solutions		Total
2012	$	294	$	117	$	411
2013		275		109		384
2014		239		95		334
2015		208		81		289
2016		174		71		245
Thereafter		468		121		589
	$	1,658	$	594	$	2,252