Lines of Businesses- Contribution of Segments to Overall Profitability (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013
Segment Reporting Information [Line Items]
Fee and other revenue	$ 2,899	[1]	$ 2,833	[2],[3]	$ 2,894	[2],[4]
Net interest revenue	728		761		719
Total revenue	3,627	[1]	3,594	[2],[3]	3,613	[2],[4]
Provision for credit losses	(18)		6		(24)
Noninterest expense	2,739		2,877		2,828
Income (loss) before taxes	906	[1]	711	[2],[3]	809	[2],[4]
Pre-tax operating margin (percent)	25.00%	[5]	20.00%	[2],[5]	22.00%	[2],[5]
Average assets	354,992		356,135		333,664
Investment Management
Segment Reporting Information [Line Items]
Fee and other revenue	900	[1]	993	[2],[3]	881	[2],[4]
Net interest revenue	70		68		62
Total revenue	970	[1]	1,061	[2],[3]	943	[2],[4]
Provision for credit losses	0		0		0
Noninterest expense	724		795		737
Income (loss) before taxes	246	[1]	266	[2],[3]	206	[2],[4]
Pre-tax operating margin (percent)	25.00%	[5]	25.00%	[2],[5]	22.00%	[2],[5]
Average assets	39,463		38,796		38,743
Investment Services
Segment Reporting Information [Line Items]
Fee and other revenue	1,887		1,860	[2]	1,861	[2]
Net interest revenue	590		610		653
Total revenue	2,477		2,470	[2]	2,514	[2]
Provision for credit losses	0		0		1
Noninterest expense	1,821		1,867		1,840
Income (loss) before taxes	656		603	[2]	673	[2]
Pre-tax operating margin (percent)	26.00%	[5]	24.00%	[2],[5]	27.00%	[2],[5]
Average assets	258,470		258,294		240,187
Other
Segment Reporting Information [Line Items]
Fee and other revenue	112		(20)	[2]	152	[2]
Net interest revenue	68		83		4
Total revenue	180		63	[2]	156	[2]
Provision for credit losses	(18)		6		(25)
Noninterest expense	194		215		251
Income (loss) before taxes	4		(158)	[2]	(70)	[2]
Average assets	$ 57,059		$ 59,045		$ 54,734

[1] Both total fee and other revenue and total revenue include income from consolidated investment management funds of $36 million, net of noncontrolling interests of $20 million, for a net impact of $16 million. Income before taxes includes noncontrolling interests of $20 million.

[2] Consolidated results and Other segment results have been restated to reflect the retrospective application of adopting new accounting guidance related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 2 of the Notes to Consolidated Financial Statements for additional information.

[3] Both total fee and other revenue and total revenue include income from consolidated investment management funds of $36 million, net of noncontrolling interests of $17 million, for a net impact of $19 million. Income before taxes includes noncontrolling interests of $17 million.

[4] Both total fee and other revenue and total revenue include income from consolidated investment management funds of $50 million, net of noncontrolling interests of $16 million, for a net impact of $34 million. Income before taxes includes noncontrolling interests of $16 million.

[5] Income before taxes divided by total revenue.