Segment Information (Financial Information for Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Net Revenues:
Asset management and administration fees	$ 632	$ 572		$ 1,243	$ 1,124
Net interest revenue	562	473		1,115	942
Trading revenue	212	235		459	458
Other	65	59		133	115
Provision for loan losses	7	1		6	(5)
Net impairment losses on securities		(3)	[1]		(7)	[1]
Total net revenues	1,478	1,337		2,956	2,627
Expenses Excluding Interest	957	925		1,913	1,884
Income before taxes on income	521	412		1,043	743
Taxes on income	197	156		393	281
Net Income	324	256		650	462
Investor Services [Member]
Net Revenues:
Asset management and administration fees	441	402		869	789
Net interest revenue	504	418		999	831
Trading revenue	145	160		316	309
Other	47	43		98	85
Provision for loan losses	6	1		5	(4)
Net impairment losses on securities		(3)			(7)
Total net revenues	1,143	1,021		2,287	2,003
Expenses Excluding Interest	734	722		1,472	1,473
Income before taxes on income	409	299		815	530
Advisor Services [Member]
Net Revenues:
Asset management and administration fees	191	170		374	335
Net interest revenue	58	55		116	111
Trading revenue	67	75		143	149
Other	18	16		35	30
Provision for loan losses	1			1	(1)
Total net revenues	335	316		669	624
Expenses Excluding Interest	223	203		441	411
Income before taxes on income	$ 112	$ 113		$ 228	$ 213

[1] There were no net impairment losses on securities for the three or six months ended June 30, 2014. Net impairment losses on securities include total other-than-temporary impairment losses of $2 million recognized in other comprehensive income, net of $(1) million reclassified from other comprehensive income, for the three months ended June 30, 2013. Net impairment losses on securities include total other-than-temporary impairment losses of $2