Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

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

The change in the net carrying amount of goodwill by reportable segment for the six months ended June 30, 2013 is as follows (in millions):

	Risk Solutions			HR Solutions			Total
Balance as of December 31, 2012	$	5,982		$	2,961		$	8,943
Goodwill related to current year acquisitions	14			2			16
Goodwill related to prior year acquisitions	(2		)	17			15
Foreign currency translation	(157		)	(22		)	(179		)
Balance as of June 30, 2013	$	5,837		$	2,958		$	8,795

Schedule of other intangible assets by asset class

Other intangible assets by asset class are as follows (in millions):

	June 30, 2013						December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Tradenames	$	1,025	$	—	$	1,025	$	1,025	$	—	$	1,025
Intangible assets with finite lives:
Customer related and contract based	2,659		1,124		1,535		2,714		969		1,745
Marketing, technology and other (1)	600		424		176		619		414		205
	$	4,284	$	1,548	$	2,736	$	4,358	$	1,383	$	2,975

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(1) Tradenames with finite lives disclosed separately in prior years are now presented in Marketing, technology and other

Schedule of estimated future amortization expense on intangible assets

The estimated future amortization for finite lived intangible assets as of June 30, 2013 is as follows (in millions):

	HR Solutions		Risk Solutions		Total
Remainder of 2013	$	139	$	55	$	194
2014	240		94		334
2015	209		79		288
2016	175		67		242
2017	139		57		196
Thereafter	338		119		457
	$	1,240	$	471	$	1,711