Financial Information for Reportable Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Net Revenues:
Asset management and administration fees	$ 524		$ 466		$ 1,504		$ 1,470
Net interest revenue	439		443		1,331		1,330
Trading revenue	204		248		666		694
Other	42		45		209	[1]	119	[1]
Provision for loan losses	(10)		(8)		(14)		(13)
Net impairment losses on securities	(3)	[2]	(13)	[2]	(28)	[2]	(22)	[2]
Total net revenues	1,196		1,181		3,668		3,578
Expenses Excluding Interest	835		821		2,562		2,438
Income before taxes on income	361		360		1,106		1,140
Taxes on income	114		140		389		439
Net income	247		220		717		701
Investor Services
Net Revenues:
Asset management and administration fees	285		254		816		805
Net interest revenue	367		377		1,117		1,137
Trading revenue	136		166		446		462
Other	22		25		76	[1]	61	[1]
Provision for loan losses	(9)		(7)		(12)		(11)
Net impairment losses on securities	(2)		(12)		(24)		(20)
Total net revenues	799		803		2,419		2,434
Expenses Excluding Interest	571		561		1,764		1,662
Income before taxes on income	228		242		655		772
Institutional Services
Net Revenues:
Asset management and administration fees	238		212		688		665
Net interest revenue	72		66		214		193
Trading revenue	69		82		221		232
Other	20		19		61	[1]	57	[1]
Provision for loan losses	(1)		(1)		(2)		(2)
Net impairment losses on securities	(1)		(1)		(4)		(2)
Total net revenues	397		377		1,178		1,143
Expenses Excluding Interest	264		259		798		777
Income before taxes on income	133		118		380		366
Unallocated
Net Revenues:
Asset management and administration fees	1
Trading revenue	(1)				(1)
Other			1		72	[1]	1	[1]
Total net revenues			1		71		1
Expenses Excluding Interest			1				(1)
Income before taxes on income					$ 71		$ 2

[1] Unallocated amount includes a pre-tax gain of $70 million relating to a confidential resolution of a vendor dispute in the second quarter of 2012.

[2] Net impairment losses on securities include total other-than-temporary impairment losses of $1 million and $2 million, net of $(2) million and $(11) million recognized in other comprehensive income, for the three months ended September 30, 2012 and 2011, respectively. Net impairment losses on securities include total other-than-temporary impairment losses of $15 million and $13 million, net of $(13) million and $(9) million recognized in other comprehensive income, for the nine months ended September 30, 2012 and 2011, respectively.