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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

Jun. 30, 2024

Dec. 31, 2023

Foreign currency forward contracts

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

$ 3,946

$ 3,662

Options/Futures contracts on notes and bonds

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

1,190

2,062

Convertible securities

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

^[1]

67

64

Investment And Embedded Derivative Instruments [Member]

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

102

110

Fair Value, Liability

(169)

(136)

Derivative, Notional Amount

5,203

5,788

Futures contracts on equities

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

^[2]

1,042

1,157

Designated as Hedging Instrument

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

127

136

Fair Value, Liability

(96)

128

Derivative, Notional Amount

3,213

3,250

Fair Value Hedging

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

1,614

1,631

Net Investment Hedging

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

1,599

1,619

Other derivative instruments

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

350

217

Other Derivative Instruments [Member]

Derivatives, Fair Value [Line Items]

Derivative, Notional Amount

1,392

1,374

Other Assets [Member] | Foreign currency forward contracts

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

35

27

Other Assets [Member] | Options/Futures contracts on notes and bonds

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

6

27

Other Assets [Member] | Futures contracts on equities

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

^[2]

0

0

Other Assets [Member] | Fair Value Hedging

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

88

126

Other Assets [Member] | Net Investment Hedging

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

39

10

Other Assets [Member] | Other derivative instruments

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

1

0

Other Assets [Member] | Other Derivative Instruments [Member]

Derivatives, Fair Value [Line Items]

Derivative Asset, Fair Value, Gross Asset

1

0

Fixed Maturities [Member] | Convertible securities

Derivatives, Fair Value [Line Items]

Derivative Asset, Not Subject to Master Netting Arrangement

^[1]

61

56

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Foreign currency forward contracts

Derivatives, Fair Value [Line Items]

Fair Value, Liability

(167)

(94)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Options/Futures contracts on notes and bonds

Derivatives, Fair Value [Line Items]

Fair Value, Liability

(2)

(42)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Futures contracts on equities

Derivatives, Fair Value [Line Items]

Fair Value, Liability

^[2]

(2)

(37)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Fair Value Hedging

Derivatives, Fair Value [Line Items]

Fair Value, Liability

0

0

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Net Investment Hedging

Derivatives, Fair Value [Line Items]

Fair Value, Liability

(96)

(128)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other derivative instruments

Derivatives, Fair Value [Line Items]

Fair Value, Liability

(5)

(5)

Accounts Payable, Accrued Expenses, And Other Liabilities [Member] | Other Derivative Instruments [Member]

Derivatives, Fair Value [Line Items]

Fair Value, Liability

(7)

(42)

Equity Securities | Convertible securities

Derivatives, Fair Value [Line Items]

Derivative Liability, Not Subject to Master Netting Arrangement

^[1]

$ 0

$ 0

[1]	Includes fair value of embedded derivatives.
[2]	Related to MRB book of business.

X

- Definition

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
-Paragraph 3
-Subparagraph (d)
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X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

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X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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X

- Definition

Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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