Goodwill and Intangible Assets-Intangible Assets by Type (Detail) (USD $) In Millions, unless otherwise specified							3 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Finite-lived Intangible Assets	Dec. 31, 2013 Finite-lived Intangible Assets	Mar. 31, 2014 Finite-lived Intangible Assets Weighted Average	Mar. 31, 2014 Finite-lived Intangible Assets Customer relationships—Investment Management	Dec. 31, 2013 Finite-lived Intangible Assets Customer relationships—Investment Management	Mar. 31, 2014 Finite-lived Intangible Assets Customer relationships—Investment Management Weighted Average	Mar. 31, 2014 Finite-lived Intangible Assets Customer contracts—Investment Services	Dec. 31, 2013 Finite-lived Intangible Assets Customer contracts—Investment Services	Mar. 31, 2014 Finite-lived Intangible Assets Customer contracts—Investment Services Weighted Average	Mar. 31, 2014 Finite-lived Intangible Assets Other	Dec. 31, 2013 Finite-lived Intangible Assets Other	Mar. 31, 2014 Finite-lived Intangible Assets Other Weighted Average	Mar. 31, 2014 Indefinite-lived Intangible Assets		Dec. 31, 2013 Indefinite-lived Intangible Assets		Mar. 31, 2014 Indefinite-lived Intangible Assets Customer relationships—Investment Management		Dec. 31, 2013 Indefinite-lived Intangible Assets Customer relationships—Investment Management		Mar. 31, 2014 Indefinite-lived Intangible Assets Trade name		Dec. 31, 2013 Indefinite-lived Intangible Assets Trade name
Intangible Assets by Major Class [Line Items]
Gross carrying amount	$ 7,175				$ 4,487			$ 2,053			$ 2,351			$ 83			$ 2,688	[1]			$ 1,325	[1]			$ 1,363	[1]
Accumulated amortization	(2,795)				(2,795)			(1,488)			(1,244)			(63)
Net carrying amount	$ 4,380	$ 4,452	$ 4,696	$ 4,809	$ 1,692	$ 1,760		$ 565	$ 594		$ 1,107	$ 1,150		$ 20	$ 16		$ 2,688	[1]	$ 2,692	[1]	$ 1,325	[1]	$ 1,323	[1]	$ 1,363	[1]	$ 1,369	[1]
Remaining weighted- average amortization period							11 years			11 years			11 years			4 years

[1] Intangible assets not subject to amortization have an indefinite life.N/A - Not applicable.