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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]      
Related party receivables $ 3    
Maximum [Member]      
Related Party Transaction [Line Items]      
Related party receivables   $ 1  
Related party payables 1 1  
Lodging and Food & Beverage [Member] | Principal Stockholder and His Family [Member]      
Related Party Transaction [Line Items]      
Goods and services sold to related party 3 3 $ 3
Lodging and Food & Beverage [Member] | Principal Stockholder [Member]      
Related Party Transaction [Line Items]      
Expense from goods and services provided by related party 2 1 2
Aviation [Member] | Principal Stockholder [Member]      
Related Party Transaction [Line Items]      
Goods and services sold to related party 20 21 17
Expense from goods and services provided by related party 6 $ 10 $ 3
Expenses paid by Company on behalf of related party 13    
Aviation [Member] | Principal Stockholder [Member] | Scenario, Plan [Member]      
Related Party Transaction [Line Items]      
Expenses paid by Company on behalf of related party $ 22