Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pre-tax
Other comprehensive income (loss)	$ 2,138	$ (3,579)	$ (3,299)
Tax
Other comprehensive income (loss)	(446)	761	698
After-tax
Other comprehensive income (loss), after-tax	1,692	(2,818)	(2,601)
Unrealized net capital gains and losses
Pre-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	1,547	(4,472)	(2,840)
Less: reclassification adjustment of realized capital gains and losses	(539)	(848)	436
Other comprehensive income (loss)	2,086	(3,624)	(3,276)
Tax
Unrealized net holding gains and losses arising during the period, net of related offsets	(322)	949	601
Less: reclassification adjustment of realized capital gains and losses	113	178	(92)
Other comprehensive income (loss)	(435)	771	693
After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets	1,225	(3,523)	(2,239)
Less: reclassification adjustment of realized capital gains and losses	(426)	(670)	344
Other comprehensive income (loss), after-tax	1,651	(2,853)	(2,583)
Unrealized net capital gains and losses | Discontinued Operations, Held-for-sale
After-tax
Losses related to held for sale investments			2,400
Unrealized foreign currency translation adjustments
Pre-tax
Other comprehensive income (loss)	85	(190)	(10)
Tax
Other comprehensive income (loss)	(18)	40	2
After-tax
Other comprehensive income (loss), after-tax	67	(150)	(8)
Unamortized pension and other postretirement prior service credit
Pre-tax
Other comprehensive income (loss)	(20)	(54)	(75)
Tax
Other comprehensive income (loss)	4	11	16
After-tax
Other comprehensive income (loss), after-tax	(16)	(43)	(59)
Discount rate for reserve for future policy benefits
Pre-tax
Other comprehensive income (loss)	(13)	289	62
Tax
Other comprehensive income (loss)	3	(61)	(13)
After-tax
Other comprehensive income (loss), after-tax	$ (10)	$ 228	$ 49