Statement of Cash Flows, Supplemental Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash payments related to operating lease liabilities	[1]	$ 560	$ 550	$ 538
Interest paid		684	661	653
Income taxes paid (refund)		10	20	19
New ROU assets obtained in exchange for operating lease liabilities		191	573	627
Increase (Decrease) in accounts payable for purchases of property and equipment		(5)	3	27
Purchase of property and equipment under capital leases and installment purchases		28	25	33
Cash and cash equivalents		156	292	232
Restricted cash		166	169	144
Restricted Cash, Noncurrent		5	5	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 327	$ 466	$ 381	$ 338

[1] Excludes the Company's contingent payments pursuant to operating leases, which are recorded as expense in the period such contingencies are resolved.