Financial Information for Reportable Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Net Revenues:
Asset management and administration fees	$ 496		$ 502		$ 980		$ 1,004
Net interest revenue	458		451		892		887
Trading revenue	219		205		462		446
Other	121	[1]	35	[1]	167	[1]	74	[1]
Provision for loan losses	(4)		(1)		(4)		(5)
Net impairment losses on securities	(7)	[2]	(2)	[2]	(25)	[2]	(9)	[2]
Total net revenues	1,283		1,190		2,472		2,397
Expenses Excluding Interest	851		804		1,727		1,617
Income before taxes on income	432		386		745		780
Taxes on income	157		148		275		299
Net income	275		238		470		481
Investor Services
Net Revenues:
Asset management and administration fees	271		275		531		551
Net interest revenue	385		387		750		760
Trading revenue	147		136		310		296
Other	27	[1]	16	[1]	54	[1]	36	[1]
Provision for loan losses	(3)		(1)		(3)		(4)
Net impairment losses on securities	(6)		(2)		(22)		(8)
Total net revenues	821		811		1,620		1,631
Expenses Excluding Interest	587		547		1,193		1,101
Income before taxes on income	234		264		427		530
Institutional Services
Net Revenues:
Asset management and administration fees	227		227		450		453
Net interest revenue	73		64		142		127
Trading revenue	72		70		152		150
Other	21	[1]	19	[1]	41	[1]	38	[1]
Provision for loan losses	(1)				(1)		(1)
Net impairment losses on securities	(1)				(3)		(1)
Total net revenues	391		380		781		766
Expenses Excluding Interest	264		258		534		518
Income before taxes on income	127		122		247		248
Unallocated
Net Revenues:
Asset management and administration fees	(2)				(1)
Trading revenue			(1)
Other	73	[1]			72	[1]
Total net revenues	71		(1)		71
Expenses Excluding Interest			(1)				(2)
Income before taxes on income	$ 71				$ 71		$ 2

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

[2] Net impairment losses on securities include total other-than-temporary impairment losses of $12 million and $11 million, net of $5 million and $9 million recognized in other comprehensive income, for the three months ended June 30, 2012 and 2011, respectively. Net impairment losses on securities include total other-than-temporary impairment losses of $14 million and $11 million, net of $(11) million and $2 million recognized in other comprehensive income, for the six months ended June 30, 2012 and 2011, respectively.