Supplemental Balance Sheet Information - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Other Current Liabilities
Supplemental Balance Sheet Disclosures [Line Items]
Rebates payable	$ 21.6	$ 26.9
Accrued payroll	12.0	18.4
Other Liabilities
Supplemental Balance Sheet Disclosures [Line Items]
Pension liabilities	$ 20.8	$ 22.5