Retirement and Other Postretirement Benefit Plans - Schedule of Amounts Recognized on Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
U.S. Non-qualified Defined Benefit Retirement Plans
Amounts recognized on the balance sheet:
Accrued liabilities	$ 4.5	$ 4.5
Other non-current liabilities	15.5	14.6
Total accrued benefit	20.0	19.1
European Defined Benefit Retirement Plans
Amounts recognized on the balance sheet:
Non-current asset	5.2	3.3
Accrued liabilities	1.5	0.4
Other non-current liabilities	16.5	17.1
Total accrued benefit	18.0	17.5
Postretirement Health Care and Life Insurance Benefit Plans
Amounts recognized on the balance sheet:
Accrued liabilities	0.6	0.6
Other non-current liabilities	5.4	5.7
Total accrued benefit	$ 6.0	$ 6.3