v3.2.0.727
Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) $ 128 $ (76) $ 72 $ (170)
Foreign Exchange Future [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) (10) (1) 15 (4)
All Other Futures Contracts And Options [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) 42 (18) 13 (40)
Convertibles and Bonds with Warrants Attached [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) [1] (5) 4 0 4
Investment And Embedded Derivative Instruments [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) 27 (15) 28 (40)
Guaranteed Living Benefits [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) [2] 104 2 59 (46)
Single-Stock Future [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) [3] (2) (71) (13) (88)
Options On Equity Market Indices [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) [3] 0 (1) (1) (3)
Guaranteed Living Benefit And Other Derivative Instruments [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) 101 (61) 44 (130)
Other Derivatives [Member]        
Commitments Contingencies And Guarantees [Line Items]        
Net realized gains (losses) $ (1) $ 9 $ (1) $ 7
[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.