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Fair Value Measurements (Fair Value Measurements, Nonrecurring) (Details) - Fair Value, Measurements, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - Changes Measurement [Member] - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment of property, plant and equipment held for use or disposal (Level 3) $ 0.5 $ 0.2 $ 6.0
Goodwill impairment (Level 3) 0.0 0.0 8.7
IPRD (Level 3) 2.2 3.8 0.9
Assets, Fair Value Disclosure $ 2.7 $ 4.0 $ 15.6