Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 50.6	$ 36.9
Income tax receivable	96.5	121.5
Value added taxes receivable	18.8	13.8
Other current assets	49.1	49.3
Prepaid expenses and other current assets, total	$ 215.0	$ 221.5