Pension - Net Pension Cost (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 2	$ 2	$ 2
Interest cost	140	132	168
Expected long-term return on plan assets	(272)	(269)	(260)
Amortization of:
Prior actuarial losses, net	89	78	78
Settlement loss	0	4	0
Net (benefit) cost	$ (41)	$ (53)	$ (12)