Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plan | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 4
Interest cost	26	28
Expected return on plan assets	(31)	(31)
Settlement	0	(5)
Net periodic benefit credit	0	0
Pension Plan | U.S. | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3
Interest cost	8	8
Expected return on plan assets	(8)	(8)
Settlement	0	(5)
Net periodic benefit credit	2	(2)
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	7	7
Expected return on plan assets	(8)	(8)
Net periodic benefit credit	(1)	(1)
Other Postretirement Plans | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	3	3
Expected return on plan assets	(4)	(4)
Net periodic benefit credit	$ 0	$ 0