Pension and Other Postretirement Healthcare Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pensions
Net periodic cost:
Service cost	$ 1	$ 1	$ 3	$ 3
Interest cost	4	3	11	10
Expected return on plan assets	(6)	(6)	(18)	(19)
Net amortization of actuarial loss and prior service credit	1	1	3	3
Total net periodic cost	0	(1)	(1)	(3)
Other Postretirement Benefit Plans
Net periodic cost:
Service cost	0	0	0	0
Interest cost	1	1	2	2
Expected return on plan assets	0	0	0	0
Net amortization of actuarial loss and prior service credit	0	0	0	1
Total net periodic cost	$ 1	$ 1	$ 2	$ 3