Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	$ (76)		$ 72		$ (170)		$ 168
Foreign Exchange Future [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(1)		12		(4)		17
All Other Futures Contracts And Options [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(18)		33		(40)		40
Convertibles and Bonds with Warrants Attached [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	4	[1]	(5)	[1]	4	[1]	1	[1]
Investment And Embedded Derivative Instruments [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(15)		40		(40)		58
Guaranteed Living Benefits [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	2	[2]	101	[2]	(46)	[2]	429	[2]
Single-Stock Future [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(71)	[3]	(66)	[3]	(88)	[3]	(303)	[3]
Options On Equity Market Indices [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(1)	[3]	(2)	[3]	(3)	[3]	(15)	[3]
Guaranteed Living Benefit And Other Derivative Instruments [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	(61)		32		(130)		110
Other Derivatives [Member]
Commitments Contingencies And Guarantees [Line Items]
Net realized gains (losses)	$ 9		$ (1)		$ 7		$ (1)

[1] (1) Includes embedded derivatives.

[2] (2) Excludes foreign exchange gains (losses) related to GLB

[3] (3) Related to GMDB and GLB blocks of business.