Employee Benefit Plans - PAC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
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 amortization	(1)	0
Net periodic benefit (credit) cost	(1)	0
PAC | Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	3	2
Expected return on plan assets	(3)	(2)
Net amortization	(1)	0
Net periodic benefit (credit) cost	(1)	0
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	7
Interest cost	28	19
Expected return on plan assets	(31)	(27)
Net amortization	4	4
Net periodic benefit (credit) cost	0	5
U.S. | PAC | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	10	7
Expected return on plan assets	(12)	(10)
Net amortization	3	4
Net periodic benefit (credit) cost	$ 1	$ 1