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Pension and Postretirement Benefits - Narrative (Details) - Jun. 30, 2015 - USD ($)
$ in Millions
Total
Pension Plans | Funded Plan  
Defined Benefit Plan Disclosure [Line Items]  
Amount expected to contribute in funded pension plans $ 0.8
Pension Contributions 0.3
Pension Plans | Unfunded Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
Amount expected to contribute in unfunded pension plans 0.6
Pension Contributions 0.3
US Postretirement Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Amount expected to contribute in postretirement benefit plans 1.1
Pension and Other Postretirement Benefit Contributions $ 0.7