Segment Information (Financial Information for Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net Revenues
Asset management and administration fees	$ 644	$ 611
Net interest revenue	588	553
Trading revenue	227	247
Other	63	68
Provision for loan losses	4	(1)
Total net revenues	1,526	1,478
Expenses Excluding Interest	1,042	956
Income before taxes on income	484	522
Taxes on income	182	196
Net Income	302	326
Investor Services [Member]
Net Revenues
Asset management and administration fees	454	428
Net interest revenue	510	495
Trading revenue	151	171
Other	45	51
Provision for loan losses	4	(1)
Total net revenues	1,164	1,144
Expenses Excluding Interest	795	738
Income before taxes on income	369	406
Advisor Services [Member]
Net Revenues
Asset management and administration fees	190	183
Net interest revenue	78	58
Trading revenue	76	76
Other	18	17
Total net revenues	362	334
Expenses Excluding Interest	247	218
Income before taxes on income	$ 115	$ 116