Commitments and Contingencies - Schedule of Environmental Remediation Reserve Activity (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Environmental remediation reserve activity
Beginning remediation accrual balance	$ 3.9	$ 6.6	$ 5.0
Current period expenses	6.0	0.9	5.0
Cash expenditures	(4.9)	(3.6)	(3.4)
Ending remediation accrual balance	5.0	3.9	6.6
Capital expenditures for environmental matters	$ 7.3	$ 4.6	$ 2.4

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

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The aggregate amount disbursed during the reporting period to settle environmental loss contingencies.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount added to the accrual for newly incurred environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates.

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Amount of environmental remediation costs capitalized. These expenditures may relate to long-lived improvements in operating facilities.

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