Goodwill and Intangible Assets-Intangible Assets by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Intangible Assets [Roll Forward]
Beginning Balance	$ 4,127		$ 4,452
Acquisitions	9
Amortization	(66)	(73)	(75)
Foreign currency translation	(23)		3
Ending Balance	4,047	4,127	4,380
Investment Management
Intangible Assets [Roll Forward]
Beginning Balance	1,923		2,065
Acquisitions	9
Amortization	(25)		(31)
Foreign currency translation	(16)		3
Ending Balance	1,891		2,037
Investment Services
Intangible Assets [Roll Forward]
Beginning Balance	1,355		1,538
Acquisitions	0
Amortization	(41)		(44)
Foreign currency translation	(7)		0
Ending Balance	1,307		1,494
Other
Intangible Assets [Roll Forward]
Beginning Balance	849		849
Acquisitions	0
Amortization	0		0
Foreign currency translation	0		0
Ending Balance	$ 849		$ 849