Statement of Cash Flows, Supplemental Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Cash payments related to operating lease liabilities	[1]	$ 571	$ 560	$ 550
Interest paid		800	684	661
Income taxes paid (refund)		18	10	20
ROU assets recorded in exchange for operating lease liabilities		12	191	573
Increase (Decrease) in accounts payable for purchases of property and equipment		36	(5)	3
Share-Based Payment Arrangement, Amount Capitalized		29	21	21
Purchase of property and equipment under capital leases and installment purchases		62	28	25
Cash and cash equivalents		105	156	292
Restricted cash and cash equivalents		171	166	169
Restricted Cash, Noncurrent		5	5	5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 281	$ 327	$ 466	$ 381

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