Other Assets - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Prepaid Expenses and Other Current Assets
Inventories	$ 41.9	$ 38.8
Prepaid expenses	63.3	66.1
Other non-trade receivables	89.5	34.6
Reinsurance receivable	12.8	12.5
Income tax receivable	13.2	78.5
Other current assets	6.1	4.5
Total	$ 226.8	$ 235.0