Basis of Presentation and Significant Accounting Policies - Summary of Accrued Expenses (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Accrued salaries and wages	$ 325.1	$ 50.1
Accrued value-added tax and other taxes	137.9	1.3
Accrued interest	49.8	15.1
Accrued estimated litigation liabilities	47.8	11.5
Accrued purchased services	24.5	18.9
Accrued insurance claims	14.4	5.8
Other accrued expenses	49.4	17.2
Total Accrued Expenses, Other	$ 648.9	$ 119.9