Employee Benefits - Obligations (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in Benefit Obligation:
Benefit obligation at beginning of year	$ 115	$ 116
Interest cost	5	5	$ 4
Actuarial gain	(6)	2
Annuity payments	(7)	(7)
Settlements	(1)	(1)
Benefit obligation at end of year	106	115	116
Change in Plan Assets:
Fair value of assets at beginning of year	253	228
Actual return (loss) on plan assets	0	33
Annuity payments	(6)	(7)
Settlements	(1)	(1)
Fair value of assets at end of year	246	253	$ 228
Funded status (included in other assets)	140	138
Changes recognized in other comprehensive income for the year ended December 31:
Amortization of actuarial gain (loss)	(3)	(7)
Net actuarial (gain) loss arising during the year	10	(18)
Total recognized in other comprehensive income for the year (pre-tax)	7	(25)
Accumulated other comprehensive loss (pre-tax) not yet recognized in net periodic benefit cost at December 31:
Actuarial loss, net	49	41
Total accumulated other comprehensive loss (pre-tax)	$ 49	$ 41