Goodwill and Intangible Assets-Goodwill by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Goodwill [Roll Forward]
Beginning Balance	$ 17,869	$ 18,073
Acquisitions	10
Foreign currency translation	(216)	27
Ending Balance	17,663	18,100
Investment Management
Goodwill [Roll Forward]
Beginning Balance	9,352	9,473
Acquisitions	10
Foreign currency translation	(109)	20
Ending Balance	9,253	9,493
Investment Services
Goodwill [Roll Forward]
Beginning Balance	8,467	8,550
Acquisitions	0
Foreign currency translation	(107)	7
Ending Balance	8,360	8,557
Other
Goodwill [Roll Forward]
Beginning Balance	50	50
Acquisitions	0
Foreign currency translation	0	0
Ending Balance	$ 50	$ 50