Other Balance Sheet Accounts (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Other Current Liabilities
Accrued compensation	$ 75.5	$ 77.0
Income tax payable	56.6	34.1
Customer volume rebates	39.2	37.8
Accrued interest	32.2	21.0
Deferred revenue	21.4	19.4
Environmental contingencies	20.7	21.5
Pension liabilities	15.2	15.6
Deferred tax liability	0.9	1.5
Other accrued liabilities	119.1	112.1
Total Other Current Liabilities	$ 380.8	$ 340.0