Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
hotel
Loss Contingencies [Line Items]        
Number of hotel properties terminated | hotel       8
Impairments, net   $ 6 $ 206 $ 45
Contract liabilities   235 229  
Post-closing credit support (up to)   61 61  
Litigation reserves   6 4  
Litigation receivable covered by insurance   3 0  
Maximum        
Loss Contingencies [Line Items]        
Range of possible loss, portion not accrued (up to)   $ 5    
Contract Termination | Receivable        
Loss Contingencies [Line Items]        
Impairments, net $ 4   $ 4  
Contract Termination | Other Assets        
Loss Contingencies [Line Items]        
Impairments, net       10
Contract Termination | Other Liabilities        
Loss Contingencies [Line Items]        
Impairments, net       $ (13)