Leases Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information Related to Leases [Abstract]
Finance Lease, Interest Payment on Liability	$ 1	$ 1	$ 1
Operating Lease, Payments	122	107	112
Finance Lease, Principal Payments	4	4	3
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	74	35	86
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	1	1	5
Finance Lease, Interest Payment on Liability	1	1	1
Operating Lease, Payments	122	107	112
Finance Lease, Principal Payments	4	4	3
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	74	35	86
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 1	$ 1	$ 5