v2.4.0.8
Commitments, Contingencies, And Guarantees (Balance Sheet Locations, Fair Values In Asset Or (Liability) Position, And Notional Values/Payment Provisions Of Derivative Instruments) (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Foreign Exchange Future [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision $ 1,010 $ 1,202
Cross Currency Swap [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 95 50
Futures Contracts On Money Market Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 1,000 3,910
Futures contracts on notes and bonds [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 1,145 871
Convertibles and Bonds with Warrants Attached [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 268 [1] 254 [1]
Investment And Embedded Derivative Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 326 321
Notional Value/Payment Provision 3,518 6,287
Single-Stock Future [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 1,427 [2] 1,692 [2]
Options On Equity Market Indices [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 250 [2] 250 [2]
Other Derivatives [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 8 8
Other Derivative Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 1,685 1,950
Guaranteed Living Benefits [Member]
    
Derivatives, Fair Value [Line Items]    
Notional Value/Payment Provision 409 [3] 277 [3]
Other Assets [Member] | Foreign Exchange Future [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 14 3
Other Assets [Member] | Futures Contracts On Money Market Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 2 3
Other Assets [Member] | Futures contracts on notes and bonds [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 7 13
Other Assets [Member] | Single-Stock Future [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 11 [2] 0 [2]
Other Assets [Member] | Options On Equity Market Indices [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 2 [2] 6 [2]
Other Assets [Member] | Other Derivatives [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 0  
Other Assets [Member] | Other Derivative Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 13 6
Other Assets [Member] | Guaranteed Living Benefits [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 0 [3] 0 [3]
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign Exchange Future [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability (2) (4)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures Contracts On Money Market Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability 0 0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on notes and bonds [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability (3) (2)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Convertibles and Bonds with Warrants Attached [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability 0 [1] 0 [1]
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Investment And Embedded Derivative Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability (5) (6)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Single-Stock Future [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability 0 [2] (60) [2]
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options On Equity Market Indices [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability 0 [2] 0 [2]
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivatives [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability (2) (2)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability (2) (62)
Fixed Maturities Available For Sale [Member] | Convertibles and Bonds with Warrants Attached [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Asset 303 [1] 302 [1]
Accounts Payable Future Policy Benefits [Member] | Guaranteed Living Benefits [Member]
    
Derivatives, Fair Value [Line Items]    
Derivative Fair Value, Liability $ (566) [3] $ (427) [3]
[1] (1) Includes fair value of embedded derivatives.
[2] (2) Related to GMDB and GLB blocks of business.
[3] (3) Includes both future policy benefits reserves and fair value derivative adjustment. Refer to Note 5 for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.