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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 | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Foreign currency forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | $ 5,211 | $ 6,182
Options/Futures contracts on notes, bonds, and equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | 1,366 | 12,944
Convertible securities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount | [1] | 41 | 12
Investment And Embedded Derivative Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 161 | 69
Fair Value, Liability |  | (306) | (166)
Derivative, Notional Amount |  | 6,618 | 19,138
Futures contracts on equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount | [2] | 952 | 905
Other Derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | 301 | 3
Other Derivative Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | 1,253 | 908
Guaranteed Minimum Income Benefit [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset | [3] | 0 | 0
Derivative, Notional Amount | [3] | 2,210 | 1,432
Designated as Hedging Instrument |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 71 | 0
Fair Value, Liability |  | (101) | 0
Derivative, Notional Amount |  | 3,002 | 0
Fair Value Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | 1,501 | 0
Net Investment Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Notional Amount |  | 1,501 | 0
Other Assets [Member] | Foreign currency forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 72 | 25
Other Assets [Member] | Options/Futures contracts on notes, bonds, and equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 57 | 33
Other Assets [Member] | Futures contracts on equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset | [2] | 107 | 0
Other Assets [Member] | Other Derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 2 | 0
Other Assets [Member] | Other Derivative Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 109 | 0
Other Assets [Member] | Fair Value Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 0 | 0
Other Assets [Member] | Net Investment Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset |  | 71 | 0
Fixed Maturities [Member] | Convertible securities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Asset, Fair Value, Gross Asset | [1] | 32 | 11
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign currency forward contracts |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | (277) | (139)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options/Futures contracts on notes, bonds, and equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | (29) | (27)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on equities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability | [2] | 0 | (16)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | 0 | 0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | 0 | (16)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Guaranteed Minimum Income Benefit [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability | [3] | (784) | (745)
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Fair Value Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | (94) | 0
Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Net Investment Hedging |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability |  | (7) | 0
Equity Securities | Convertible securities |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Fair Value, Liability | [1] | $ 0 | $ 0
[1] | Includes fair value of embedded derivatives.
[2] | Related to GMDB and GLB book of business.
[3] | 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.

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