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Acquisitions and Disposals - Sale of operating affiliate (Details) - ARX Holding Corporation [Member]
$ in Millions
Apr. 01, 2015
USD ($)
Business Acquisition [Line Items]  
Ownership percentage remaining 40.60%
Investments in affiliates $ 220.2
Disposal Group, Including Discontinued Operation, Consideration 560.6
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal $ 340.4