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Contracts with Customers (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]    
Allowance for credit loss $ 187 $ 191
Loyalty Program    
Disaggregation of Revenue [Line Items]    
Change in contract with customer liability 191  
Contract with customer liability 6,785 6,594
Reclassification of deferred revenue to liability for guest loyalty program 61  
Deferred revenue recognized 1,572  
Deferred revenue    
Disaggregation of Revenue [Line Items]    
Change in contract with customer liability (48)  
Contract with customer liability 1,283 $ 1,331
Deferred revenue recognized $ 148