Schedule of Positions in Derivative Instruments (Detail) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative assets, fair value		$ 96	$ 433
Derivative liabilities, fair value		868	616
Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value		526	590
Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		342	26
Other invested assets
Derivative [Line Items]
Derivative assets, fair value		77	414
Interest rate swaps | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		342	26
Interest rate swaps | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		30	364
Foreign currency swaps | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		17	6
Equity index options | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		30	42
Other foreign currency contracts | Other invested assets
Derivative [Line Items]
Derivative assets, fair value			2
GMWB embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value	[1]	277	271
GMWB embedded derivatives | Reinsurance recoverable
Derivative [Line Items]
Derivative assets, fair value	[2]	19	19
Fixed index annuity embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value		233	294
Indexed universal life embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value		16	25
Designated As Hedging Instrument
Derivative [Line Items]
Derivative assets, fair value		47	370
Derivative liabilities, fair value		342	26
Designated As Hedging Instrument | Cash Flow Hedges
Derivative [Line Items]
Derivative assets, fair value		47	370
Derivative liabilities, fair value		342	26
Designated As Hedging Instrument | Cash Flow Hedges | Interest rate swaps | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		342	26
Designated As Hedging Instrument | Cash Flow Hedges | Interest rate swaps | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		30	364
Designated As Hedging Instrument | Cash Flow Hedges | Foreign currency swaps | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		0	0
Designated As Hedging Instrument | Cash Flow Hedges | Foreign currency swaps | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		17	6
Derivatives not designated as hedges
Derivative [Line Items]
Derivative assets, fair value		49	63
Derivative liabilities, fair value		526	590
Derivatives not designated as hedges | Equity index options | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		0	0
Derivatives not designated as hedges | Equity index options | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		30	42
Derivatives not designated as hedges | Financial futures | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		0	0
Derivatives not designated as hedges | Financial futures | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		0	0
Derivatives not designated as hedges | Other foreign currency contracts | Other liabilities
Derivative [Line Items]
Derivative liabilities, fair value		0	0
Derivatives not designated as hedges | Other foreign currency contracts | Other invested assets
Derivative [Line Items]
Derivative assets, fair value		0	2
Derivatives not designated as hedges | GMWB embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value	[3]	277	271
Derivatives not designated as hedges | GMWB embedded derivatives | Reinsurance recoverable
Derivative [Line Items]
Derivative assets, fair value	[4]	19	19
Derivatives not designated as hedges | Fixed index annuity embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value	[5]	233	294
Derivatives not designated as hedges | Fixed index annuity embedded derivatives | Other assets
Derivative [Line Items]
Derivative assets, fair value		0	0
Derivatives not designated as hedges | Indexed universal life embedded derivatives | Policyholder account balances
Derivative [Line Items]
Derivative liabilities, fair value	[6]	16	25
Derivatives not designated as hedges | Indexed universal life embedded derivatives | Reinsurance recoverable
Derivative [Line Items]
Derivative assets, fair value		$ 0	$ 0

[1] Represents embedded derivatives associated with our GMWB liabilities, excluding the impact of reinsurance.

[2] Represents embedded derivatives associated with the reinsured portion of our GMWB liabilities.

[3] Represents the embedded derivatives associated with our GMWB liabilities, excluding the impact of reinsurance.

[4] Represents embedded derivatives associated with the reinsured portion of our guaranteed minimum withdrawal benefits (“GMWB”) liabilities.

[5] Represents the embedded derivatives associated with our fixed index annuity liabilities.

[6] Represents the embedded derivatives associated with our indexed universal life liabilities.