Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 150	$ 118	$ 438	$ 419
Other Comprehensive Income (Loss), before Tax [Abstract]
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax	5	4	18	21
Change in unrealized gains (losses) on available-for-sale securities	291	728	650	493
Other Comprehensive Income (Loss), before Tax	296	732	668	514
Other Comprehensive Income (Loss), Tax	62	153	140	108
Other Comprehensive Income (Loss), Net of Tax	234	579	528	406
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	384	697	966	825
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 384	$ 697	$ 966	$ 825