Benefit Plans - Schedule of Changes in and Amount of Accumulated Postretirement Benefit Obligation (Details) - Postretirement Benefit Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated postretirement benefit obligation as of January 1	$ 16	$ 34
Service cost	0	0
Interest cost	1	2
Benefits paid	(2)	(2)
Actuarial gains	0	(18)
Accumulated postretirement benefit obligation as of December 31	$ 15	$ 16