Employee Benefit Plans - MEC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Plan | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 7	$ 20	$ 22
Interest cost	20	21	58	59
Expected return on plan assets	(28)	(32)	(82)	(101)
Settlement	0	4	2	4
Net amortization	4	6	13	19
Net periodic benefit (credit) cost	3	6	11	3
Pension Plan | U.S. | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	5	14	15
Interest cost	5	6	15	17
Expected return on plan assets	(7)	(9)	(21)	(28)
Settlement	0	0	2	0
Net amortization	0	0	1	1
Net periodic benefit (credit) cost	3	2	11	5
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	8	8
Interest cost	5	4	15	14
Expected return on plan assets	(8)	(5)	(22)	(16)
Net amortization	0	0	(1)	(2)
Net periodic benefit (credit) cost	(1)	1	0	4
Other Postretirement Plans | MEC
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	6	6
Interest cost	2	2	6	6
Expected return on plan assets	(4)	(2)	(11)	(7)
Net amortization	(1)	(1)	(2)	(3)
Net periodic benefit (credit) cost	$ (1)	$ 1	$ (1)	$ 2