Goodwill by Business Segment (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012 Investment Management	Jun. 30, 2011 Investment Management		Jun. 30, 2012 Investment Services		Jun. 30, 2011 Investment Services		Jun. 30, 2012 Other Operating Segment		Jun. 30, 2011 Other Operating Segment		Dec. 31, 2010 Other Operating Segment
Goodwill [Line Items]
Beginning Balance	$ 17,904		$ 18,042		$ 9,373	$ 9,359		$ 8,491		$ 8,515	[1]	$ 40		$ 168	[1]	$ 168	[1]
Foreign exchange translation	6		146		13	64		(7)		82	[1]
Other	(1)	[2]	3	[2]		7	[2]	(11)	[2]	(4)	[1],[2]	10	[2]
Ending Balance	$ 17,909		$ 18,191		$ 9,386	$ 9,430		$ 8,473		$ 8,593	[1]	$ 50		$ 168	[1]	$ 168	[1]

[1] Includes the reclassification of goodwill associated with the Shareowner Services business from Investment Services to the other segment.

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