Financial Information for the Company's Reportable Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Net Revenues
Asset management and administration fees									$ 1,928		$ 1,822		$ 1,875
Net interest revenue									1,725		1,524		1,245
Trading revenue									927		830		996
Other									160		135		175
Provision for loan losses									(18)		(27)		(38)
Net impairment losses on securities									(31)	[1]	(36)	[1]	(60)	[1]
Total net revenues	1,113	1,181	1,190	1,207	1,127	1,063	1,080	978	4,691		4,248		4,193
Expenses Excluding Interest	861	821	804	813	898	864	742	965	3,299	[2]	3,469	[2]	2,917	[2]
Income before taxes on income									1,392		779		1,276
Taxes on income									(528)		(325)		(489)
Net Income	163	220	238	243	119	124	205	6	864		454		787
Capital expenditures									190		127		139
Depreciation and amortization									155		146		159
Investor Services
Net Revenues
Asset management and administration fees									1,053		976		968
Net interest revenue									1,468		1,297		1,058
Trading revenue									625		557		679
Other									85		70		93
Provision for loan losses									(15)		(23)		(34)
Net impairment losses on securities									(27)		(32)		(54)
Total net revenues									3,189		2,845		2,710
Expenses Excluding Interest									2,261	[2]	2,065	[2]	1,906	[2]
Income before taxes on income									928		780		804
Capital expenditures									120		91		95
Depreciation and amortization									108		93		100
Institutional Services
Net Revenues
Asset management and administration fees									875		846		907
Net interest revenue									257		227		187
Trading revenue									302		273		317
Other									75		65		82
Provision for loan losses									(3)		(4)		(4)
Net impairment losses on securities									(4)		(4)		(6)
Total net revenues									1,502		1,403		1,483
Expenses Excluding Interest									1,039	[2]	960	[2]	929	[2]
Income before taxes on income									463		443		554
Capital expenditures									70		36		44
Depreciation and amortization									47		52		59
Unallocated
Net Revenues
Expenses Excluding Interest									(1)	[2]	444	[2]	82	[2]
Income before taxes on income									1		(444)		(82)
Depreciation and amortization											$ 1

[1] Net impairment losses on securities include total other-than-temporary impairment losses of $18 million, $41 million, and $278 million, net of $(13) million, $5 million, and $218 million recognized in other comprehensive income in 2011, 2010, and 2009, respectively.

[2] Unallocated amount primarily includes class action litigation and regulatory reserves of $320 million and money market mutual fund charges of $132 million in 2010, and facilities and severance charges relating to the Company's cost reduction measures in 2009.