Lease Obligations - Lessee - Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Amortization of ROU assets	$ 5	$ 5	$ 14	$ 14
Interest on lease liabilities	1	1	4	3
Total finance lease costs	6	6	18	17
Operating lease cost	21	20	62	59
Short-term lease cost	0	0	1	1
Variable lease cost	8	8	21	24
Sublease income	(1)	(1)	(2)	(2)
Total operating lease costs	28	27	82	82
Total lease costs	34	33	100	99
Impairment losses and termination charges	$ 0	$ 1	$ 2	$ 3