Benefit Obligations - Schedule of Net Periodic Benefit Costs Recognized (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 3
Interest cost	29	31
Expected return on plan assets	(32)	(34)
Total	1	0
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	1	1
Expected return on plan assets	0	0
Total	$ 1	$ 1