Goodwill and Intangible Assets-Intangible Assets by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2013
Intangible Assets [Roll Forward]
Beginning Balance	$ 4,452			$ 4,809
Amortization	(75)		(82)	(86)
Foreign exchange translation	3			(27)
Ending Balance	4,380		4,452	4,696
Investment Management
Intangible Assets [Roll Forward]
Beginning Balance	2,065			2,220	[1]
Amortization	(31)			(39)	[1]
Foreign exchange translation	3			(23)	[1]
Ending Balance	2,037			2,158	[1]
Investment Services
Intangible Assets [Roll Forward]
Beginning Balance	1,538			1,732
Amortization	(44)	[2]		(47)
Foreign exchange translation	0			(3)
Ending Balance	1,494			1,682
Other
Intangible Assets [Roll Forward]
Beginning Balance	849			857	[1]
Amortization	0			0	[1]
Foreign exchange translation	0			(1)	[1]
Ending Balance	$ 849			$ 856	[1]

[1] Includes the reclassification of intangible assets associated with the Newton Private Clients business from Investment Management to the Other segment.

[2] Other changes in goodwill include purchase price adjustments and certain other reclassifications.