Benefit Obligations - Schedule of Net Periodic Benefit Costs Recognized (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 3	$ 8	$ 10
Interest cost	32	17	98	50
Expected return on plan assets	(32)	(42)	(98)	(125)
Total	2	(22)	8	(65)
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1	0	1
Interest cost	1	0	2	1
Expected return on plan assets	0	0	0	0
Total	$ 1	$ 1	$ 2	$ 2