Investments - Schedule of Change in Unrealized Net Capital Gains (Losses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	$ 1,365	$ (192)	$ 2,096
Amounts recognized for:
Reclassification of noncontrolling interest	(3)	(10)	(10)
Deferred income taxes	(294)	35	(435)
Change in unrealized net capital gains and losses, after-tax	1,068	(167)	1,651
Limited partnerships interests
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	0	4	(6)
Investments classified as held for sale
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	110	(110)	0
Fixed income securities
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	1,254	(85)	2,101
Short-term investments
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	1	(1)	0
Derivative instruments
Change in Unrealized Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss)
Total	$ 0	$ 0	$ 1