Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 594	$ 586	$ 387
Other comprehensive income (loss), before tax:
Change in current discount rate	24	28	16
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, before Tax, Portion Attributable to Parent	622	(170)	661
Other Comprehensive Income (Loss), before Tax	646	(142)	677
Other Comprehensive Income (Loss), Tax	136	(29)	141
Other Comprehensive Income (Loss), Net of Tax	510	(113)	536
Comprehensive income	$ 1,104	$ 473	$ 923