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Property And Equipment, net (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 4,024 $ 4,031
Less: accumulated depreciation 725 658
Property and equipment, net 3,299 3,373
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,129 1,105
Buildings and leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,487 1,491
Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,141 1,141
Construction in progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 267 $ 294