Goodwill and Intangible Assets-Intangible Assets by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended						3 Months Ended	9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014 Investment Management	Sep. 30, 2013 Investment Management		Jun. 30, 2013 Investment Services	Sep. 30, 2014 Investment Services	Sep. 30, 2013 Investment Services		Sep. 30, 2014 Other	Sep. 30, 2013 Other
Intangible Assets [Roll Forward]
Beginning Balance				$ 4,452	$ 4,809		$ 2,065	$ 2,220	[1]		$ 1,538	$ 1,732		$ 849	$ 857	[1]
Disposition					(8)			0	[1]			(1)			(7)	[1]
Amortization	(75)	(75)	(81)	(225)	(260)		(93)	(113)	[1]		(132)	(147)	[2]	0	0	[1]
Foreign currency translation				(12)	0		(7)	0	[1]		(5)	1		0	(1)	[1]
Other					(14)	[3]		(13)	[1],[3]			(1)	[3]		0	[1],[3]
Ending Balance	4,215		4,527	4,215	4,527		1,965	2,094	[1]		1,401	1,584		849	849	[1]
Impairment of Intangible Assets (Excluding Goodwill)										$ 8

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

[2] Includes an $8 million intangible asset impairment recorded in the second quarter of 2013.

[3] Other changes in intangible assets include purchase price adjustments and certain other reclassifications.