Leases Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease, Cost [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 4	$ 5	$ 4
Finance Lease, Interest Expense	1	1	1
Finance Lease Cost	5	6	5
Operating Lease, Cost	119	111	114
Short-term Lease, Cost	13	13	13
Variable Lease, Cost	0	0	1
Sublease Income	4	4	0
Lease, Cost	133	126	133
Lease Income	10	10	11
Lease Income	10	10	11
Finance Lease, Right-of-Use Asset, Amortization	4	5	4
Finance Lease, Interest Expense	1	1	1
Finance Lease Cost	5	6	5
Operating Lease, Cost	119	111	114
Short-term Lease, Cost	13	13	13
Variable Lease, Cost	0	0	1
Sublease Income	4	4	0
Lease, Cost	133	126	$ 133
Motional autonomous driving joint venture [Member]
Lease, Cost [Abstract]
Lease Income	3	3
Lease Income	$ 3	$ 3