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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]        
Cash payments related to operating lease liabilities [1] $ 283 $ 284    
Interest Paid 441 367    
Income taxes paid 9 10    
ROU assets recorded in exchange for operating lease liabilities (70) 28    
Increase (decrease) in accounts payable for purchases of property and equipment (18) 16    
Share-Based Payment Arrangement, Amount Capitalized 13 14    
Purchase of property and equipment under capital leases and installment purchases 41 39    
Cash and cash equivalents 155   $ 105  
Restricted cash and cash equivalents, current 171   171  
Cash, Cash Equivalents, Restricted Cash and Cash Equivalents $ 331 $ 488 $ 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.