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, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Interest cost capitalized	$ 5.4	$ 6.2	$ 4.9
Depreciation and amortization expense for property and equipment	$ 124.6	$ 147.8	$ 160.2