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Contingencies - Additional Information (Detail)
$ in Millions
Sep. 30, 2017
USD ($)
Hotel
Aug. 31, 2017
Hotel
Hurricanes Harvey and Irma    
Loss Contingencies [Line Items]    
Loss contingency, estimate of possible loss | $ $ 31  
Insurance receivable | $ $ 31  
Houston | Hurricane Harvey    
Loss Contingencies [Line Items]    
Number of hotels affected   4
Florida | Hurricane Irma    
Loss Contingencies [Line Items]    
Number of hotels affected 9  
Number of hotels closed for a period of time 7