Pension Plans and Other Postretirement Benefits Pension and Postretirement Plan Contributions (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Other postretirement benefits payments	$ 0.5	$ 0.8
Chemetall Surface Treatment
Defined Benefit Plan Disclosure [Line Items]
Pension contributions		1.0
Continuing Operations
Defined Benefit Plan Disclosure [Line Items]
Pension contributions	$ 2.4	$ 2.4

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- Definition

The amount of cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

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- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

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