Goodwill and Intangible Assets - Intangible Assets by Business Segment (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Intangible Assets [Roll Forward]
Beginning Balance		$ 3,842	$ 4,127
Acquisitions			9
Amortization		(57)	(66)
Foreign currency translation		(4)	(23)
Ending Balance		3,781	4,047
Investment Management
Intangible Assets [Roll Forward]
Beginning Balance		1,807	1,911	[1]
Acquisitions	[1]		9
Amortization		(19)	(24)	[1]
Foreign currency translation		(6)	(15)	[1]
Ending Balance		1,782	1,881	[1]
Investment Services
Intangible Assets [Roll Forward]
Beginning Balance		1,186	1,355
Acquisitions			0
Amortization		(38)	(41)
Foreign currency translation		2	(7)
Ending Balance		1,150	1,307
Other
Intangible Assets [Roll Forward]
Beginning Balance		849	861	[1]
Acquisitions	[1]		0
Amortization		0	(1)	[1]
Foreign currency translation		0	(1)	[1]
Ending Balance		$ 849	$ 859	[1]

[1] Includes the reclassification of intangible assets associated with Meriten from Investment Management to the Other segment.