Employment Benefit Plans Change in Benefit Obligation (Details) - Pension Benefits - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of period	$ 1,616	$ 1,739
Service cost	10	11	$ 10
Interest cost	86	83	84
Actuarial loss (gain)	34	(78)
Benefits paid	(139)	(138)
Settlements	(6)	(1)
Projected benefit obligation at end of period	1,601	1,616	$ 1,739
Component representing future salary increases	(10)	(13)
Accumulated benefit obligation at end of period	$ 1,591	$ 1,603