Lines of Businesses- Contribution of Segments to Overall Profitability (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended						9 Months Ended
	Sep. 30, 2013		Jun. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Net (income) attributable to noncontrolling interests	$ (8)		$ (40)		$ (25)		$ (64)		$ (67)
Fee and other revenue	2,987	[1]	3,213	[2]	2,901	[3]	9,078	[4]	8,625	[5]
Investment Management
Segment Reporting Information [Line Items]
Income of consolidated investment management funds	32		65		47		147		147
Net (income) attributable to noncontrolling interests	(8)		(39)		(25)		(63)		(65)
Fee and other revenue	$ 24		$ 26		$ 22		$ 84		$ 82

[1] Total fee and other revenue includes income from consolidated investment management funds of $32 million, net of noncontrolling interests of $8 million, for a net impact of $24 million. Income before taxes includes noncontrolling interests of $8 million.

[2] Total fee and other revenue includes income from consolidated investment management funds of $65 million, net of noncontrolling interests of $39 million, for a net impact of $26 million. Income before taxes includes noncontrolling interests of $39 million.

[3] Total fee and other revenue includes income from consolidated investment management funds of $47 million, net of noncontrolling interests of $25 million, for a net impact of $22 million. Income before taxes includes noncontrolling interests of $25 million.

[4] Total fee and other revenue includes income from consolidated investment management funds of $147 million, net of noncontrolling interests of $63 million, for a net impact of $84 million. Income before taxes includes noncontrolling interests of $63 million.

[5] Total fee and other revenue includes income from consolidated investment management funds of $147 million, net of noncontrolling interests of $65 million, for a net impact of $82 million. Income before taxes includes noncontrolling interests of $65 million.