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Property and Equipment, net - Interest Cost Capitalized and Depreciation and Amortization Expense for Property and Equipment (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Abstract]      
Interest cost capitalized $ 6.3 $ 10.3 $ 11.0
Depreciation and amortization expense for property and equipment $ 115.9 $ 107.0 $ 88.2