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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]        
Cash payments related to operating lease liabilities [1] $ 142 $ 142    
Interest Paid 282 249    
Income taxes paid (refunded) 0 (2)    
ROU assets recorded in exchange for operating lease liabilities (97) 30    
Increase (decrease) in accounts payable for purchases of property and equipment (15) 2    
Share-Based Payment Arrangement, Amount Capitalized 7 6    
Purchase of property and equipment under capital leases and installment purchases 25 21    
Cash and cash equivalents 125   $ 105  
Restricted cash and cash equivalents, current 168   171  
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents $ 298 $ 388 $ 281 $ 327
[1] Excludes the Company's contingent payments pursuant to operating leases, which are recorded as expense in the period such contingencies are resolved.