Accumulated Other Comprehensive Income (Loss) - Changes in AOCI, including Reclassification Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Available-for-sale securities, Before-Tax Amount:
Fixed maturities	$ (1,743)	$ (196)	$ (6,954)	$ (3,295)
Other				(2)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	(1)	(2)	89	(1,797)
Other Comprehensive Income (Loss), Deferred Acquisition Costs and Value Of Business Acquired (VOBA), Available-for-Sale Securities Adjustment, before Tax	395	(22)	1,585	1,250
Premium deficiency reserve		56	14	445
Sales inducements and other intangibles	(4)	1	(13)	420
Change in unrealized gains/losses on available-for-sale securities	(1,353)	(163)	(5,279)	(2,979)
Available-for-sale securities, Income Tax:
Fixed maturities	367	41	1,461	461
Other				0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0	(19)	377
DAC/VOBA	(83)	4	(333)	(263)
Premium deficiency reserve		(12)	(3)	(93)
Sales inducements and other intangibles	1	0	3	(88)
Change in unrealized gains/losses on available-for-sale securities	285	33	1,109	394
Available-for-sale securities, After-Tax Amount:
Fixed maturities	(1,376)	(155)	(5,493)	(2,834)
Other				(2)
Adjustments for amounts recognized in Net realized capital gains (losses) in the Condensed Consolidated Statements of Operations	(1)	(2)	70	(1,420)
DAC/VOBA	312	(18)	1,252	987
Premium deficiency reserve		44	11	352
Sales inducements and other intangibles	(3)	1	(10)	332
Change in unrealized gains/losses on available-for-sale securities	(1,068)	(130)	(4,170)	(2,585)
Derivatives, Before-Tax Amount:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	63	23	122	21
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(5)	(5)	(15)	(16)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Total	58	18	107	5
Derivatives, Income Tax:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	(14)	(4)	(26)	(4)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	1	1	3	3
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(13)	(3)	(23)	(1)
Derivatives, After-Tax Amount:
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	49	19	96	17
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(4)	(4)	(12)	(13)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Total	45	15	84	4
Pension and other postretirement benefits liability, Before-tax Amount:
Amortization of prior service cost recognized in Operating expenses in the Condensed Consolidated Statements of Operations				(1)
Pension and other postretirement benefits liability	0	0	0	(1)
Pension and other post-employment benefit liability, Income Tax:
Amortization of prior service cost recognized in Operating expenses in the Condensed Consolidated Statements of Operations				0
Change in pension and other postretirement benefits liability				0
Pension and other postretirement benefits liability, After-tax Amount:
Amortization of prior service cost recognized in Operating expenses in the Condensed Consolidated Statements of Operations				(1)
Change in pension and other postretirement benefits liability				(1)
Other comprehensive income (loss), before tax	(1,295)	(145)	(5,172)	(2,975)
Other comprehensive income (loss), tax	272	30	1,086	393
Other comprehensive income (loss), after tax	$ (1,023)	$ (115)	$ (4,086)	$ (2,582)