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Statement of Cash Flows, Supplemental Information (Tables)
 12 Months Ended
Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]  
Supplemental Disclosure of Cash Flow Information and Non-cash Investing and Financing Activities
The following table is a summary of the supplemental cash flow information during the years ended December 31, 2021, 2020 and 2019.
 Years Ended December 31,
 202120202019
Supplemental disclosure of cash flow information:
Cash payments related to operating lease liabilities(a)
$550 $538 $541 
Interest paid661 653 661 
Income taxes paid 20 19 16 
Supplemental disclosure of non-cash investing and financing activities:
New ROU assets obtained in exchange for operating lease liabilities573 627 431 
Increase in accounts payable for purchases of property and equipment
3 27 2 
Purchase of property and equipment under finance leases and installment land purchases
25 33 33 
(a)Excludes the Company's contingent payments pursuant to operating leases, which are recorded as expense in the period such contingencies are resolved.
Schedule of Cash, Cash Equivalents and Restricted Cash [Table Text Block]
The reconciliation of cash, cash equivalents, and restricted cash reported within various lines on the consolidated balance sheet to amounts reported in the consolidated statement of cash flows is shown below.
As of December 31,
202120202019
Cash and cash equivalents$292 $232 $196 
Restricted cash, current169 144 137 
Restricted cash reported within other assets, net5 5 5 
Cash, cash equivalents and restricted cash$466 $381 $338