Segment Information (Financial Information for Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Net Revenues:
Asset management and administration fees									$ 2,315		$ 2,043		$ 1,928
Net interest revenue									1,980		1,764		1,725
Trading revenue									913		868		927
Other — net									236	[1]	256	[1]	160	[1]
Provision for loan losses									1		(16)		(18)
Net impairment losses on securities									(10)	[2]	(32)	[2]	(31)	[2]
Total net revenues	1,435	1,373	1,337	1,290	1,215	1,196	1,283	1,189	5,435		4,883		4,691
Expenses Excluding Interest	937	909	925	959	871	835	851	876	3,730		3,433		3,299
Income before taxes on income									1,705		1,450		1,392
Capital expenditures									270		138		190
Depreciation and amortization									202		196		155
Pretax gain related to confidential resolution of a vendor dispute											70
Investor Services [Member]
Net Revenues:
Asset management and administration fees									1,627		1,436		1,357
Net interest revenue									1,756		1,559		1,542
Trading revenue									621		612		667
Other — net									178	[1]	123	[1]	98	[1]
Provision for loan losses									1		(15)		(16)
Net impairment losses on securities									(9)		(29)		(29)
Total net revenues									4,174		3,686		3,619
Expenses Excluding Interest									2,899		2,693		2,569
Income before taxes on income									1,275		993		1,050
Capital expenditures									190		98		134
Depreciation and amortization									155		157		122
Advisor Services [Member]
Net Revenues:
Asset management and administration fees									689		607		571
Net interest revenue									224		205		183
Trading revenue									292		255		260
Other — net									57	[1]	62	[1]	62	[1]
Provision for loan losses											(1)		(2)
Net impairment losses on securities									(1)		(3)		(2)
Total net revenues									1,261		1,125		1,072
Expenses Excluding Interest									831		739		731
Income before taxes on income									430		386		341
Capital expenditures									80		40		56
Depreciation and amortization									47		39		33
Unallocated [Member]
Net Revenues:
Asset management and administration fees									(1)
Trading revenue											1
Other — net									1	[1]	71	[1]
Total net revenues											72
Expenses Excluding Interest											1		(1)
Income before taxes on income											$ 71		$ 1

[1] Unallocated amount includes a non-recurring 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 $2 million, $15 million, and $18 million recognized in other comprehensive (loss) income, net of $(8) million, $(17) million, and $(13) million reclassified from other comprehensive (loss) income in 2013, 2012, and 2011, respectively.