Financial Information for Reportable Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Net Revenues
Asset management and administration fees									$ 2,043		$ 1,928		$ 1,822
Net interest revenue									1,764		1,725		1,524
Trading revenue									868		927		830
Other - net									256	[1]	160	[1]	135	[1]
Provision for loan losses									(16)		(18)		(27)
Net impairment losses on securities									(32)	[2]	(31)	[2]	(36)	[2]
Total net revenues	1,215	1,196	1,283	1,189	1,113	1,181	1,190	1,207	4,883		4,691		4,248
Expenses Excluding Interest	871	835	851	876	861	821	804	813	3,433	[3]	3,299	[3]	3,469	[3]
Income before taxes on income									1,450		1,392		779
Taxes on income									522		528		325
Net Income	211	247	275	195	163	220	238	243	928		864		454
Capital expenditures									138		190		127
Depreciation and amortization									196		155		146
Investor Services
Net Revenues
Asset management and administration fees									1,109		1,053		976
Net interest revenue									1,479		1,468		1,297
Trading revenue									574		625		557
Other - net									108	[1]	85	[1]	70	[1]
Provision for loan losses									(14)		(15)		(23)
Net impairment losses on securities									(28)		(27)		(32)
Total net revenues									3,228		3,189		2,845
Expenses Excluding Interest									2,363	[3]	2,261	[3]	2,065	[3]
Income before taxes on income									865		928		780
Capital expenditures									91		120		91
Depreciation and amortization									148		108		93
Institutional Services
Net Revenues
Asset management and administration fees									934		875		846
Net interest revenue									285		257		227
Trading revenue									293		302		273
Other - net									77	[1]	75	[1]	65	[1]
Provision for loan losses									(2)		(3)		(4)
Net impairment losses on securities									(4)		(4)		(4)
Total net revenues									1,583		1,502		1,403
Expenses Excluding Interest									1,069	[3]	1,039	[3]	960	[3]
Income before taxes on income									514		463		443
Capital expenditures									47		70		36
Depreciation and amortization									48		47		52
Unallocated
Net Revenues
Trading revenue									1
Other - net									71	[1]
Total net revenues									72
Expenses Excluding Interest									1	[3]	(1)	[3]	444	[3]
Income before taxes on income									71		1		(444)
Depreciation and amortization													$ 1

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

[2] Net impairment losses on securities include total other-than-temporary impairment losses of $15 million, $18 million, and $41 million, net of $(17) million, $(13) million, and $5 million recognized in other comprehensive income in 2012, 2011, and 2010, respectively.

[3] Unallocated amount primarily includes class action litigation and regulatory reserves of $320 million and money market mutual fund charges of $132 million in 2010.