Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plan | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 7
Interest cost	28	19
Expected return on plan assets	(31)	(27)
Settlement	(5)	2
Net periodic benefit (credit) cost	0	5
Pension Plan | U.S. | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	5
Interest cost	8	5
Expected return on plan assets	(8)	(7)
Settlement	(5)	2
Net periodic benefit (credit) cost	(2)	5
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2
Interest cost	7	5
Expected return on plan assets	(8)	(7)
Net periodic benefit (credit) cost	(1)	0
Other Postretirement Plans | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2
Interest cost	3	2
Expected return on plan assets	(4)	(4)
Net periodic benefit (credit) cost	$ 0	$ 0