Reclassifications In (Out) of Accumulated Other Comprehensive Income (Loss), Net of Taxes (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income		$ (808)	$ (859)	$ (2,359)	$ (2,504)
Net investment (gains) losses		69	(88)	33	(191)
Interest expense		26	35	78	129
Income taxes		52	67	183	201
(Income) loss from continuing operations		(134)	(306)	(535)	(725)
Amount reclassified from accumulated other comprehensive income (loss) | Net unrealized investment (gains) losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment (gains) losses	[1]	26	(12)	39	(17)
Income taxes		(5)	3	(8)	4
(Income) loss from continuing operations		21	(9)	31	(13)
Amount reclassified from accumulated other comprehensive income (loss) | Derivatives qualifying as hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income taxes		21	21	60	57
(Income) loss from continuing operations		(37)	(37)	(111)	(105)
Amount reclassified from accumulated other comprehensive income (loss) | Derivatives qualifying as hedges | Interest rate swaps | Derivative liabilities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense		0	1	2	1
Amount reclassified from accumulated other comprehensive income (loss) | Derivatives qualifying as hedges | Interest rate swaps | Derivative assets
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income		(55)	(58)	(167)	(162)
Net investment (gains) losses		(3)	(1)	(5)	(1)
Amount reclassified from accumulated other comprehensive income (loss) | Derivatives qualifying as hedges | Foreign currency swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income		$ 0	$ 0	$ (1)	$ 0

[1] Amounts exclude adjustments to DAC, present value of future profits, sales inducements, benefit reserves and policyholder contract balances.