Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

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

The changes in the net carrying amount of goodwill by reportable segment for the six months ended June 30, 2015 are as follows (in millions):

	Risk Solutions			HR Solutions			Total
Balance as of January 1, 2015	$	5,911		$	2,949		$	8,860
Goodwill related to current year acquisitions	1			15			16
Goodwill related to disposals	—			(13		)	(13		)
Goodwill related to prior year acquisitions	(1		)	—			(1		)
Foreign currency translation	(189		)	(12		)	(201		)
Balance as of June 30, 2015	$	5,722		$	2,939		$	8,661

Schedule of other intangible assets by asset class

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

	June 30, 2015						December 31, 2014
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Intangible assets with indefinite lives:
Tradenames	$	1,019	$	—	$	1,019	$	1,019	$	—	$	1,019
Intangible assets with finite lives:
Customer related and contract based	2,930		1,706		1,224		2,952		1,579		1,373
Technology and other	552		445		107		571		443		128
Total	$	4,501	$	2,151	$	2,350	$	4,542	$	2,022	$	2,520

Schedule of estimated future amortization expense on intangible assets

The estimated future amortization for finite lived intangible assets as of June 30, 2015 is as follows (in millions):

	Risk Solutions		HR Solutions		Total
Remainder of 2015	$	56	$	103	$	159
2016	104		172		276
2017	93		138		231
2018	78		92		170
2019	68		73		141
Thereafter	188		166		354
Total	$	587	$	744	$	1,331