Financial Instruments - Schedule of Fair Value Measurements (Details) - Recurring - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Asset Category
Total	$ 13.2	$ 14.2
Liability Category
Total	90.1	96.7
Other current assets | Level 2 | Foreign exchange and metals contracts not designated as hedging instruments | Not Designated as Hedging Instrument
Asset Category
Derivatives	5.5	8.5
Other assets | Level 2
Asset Category
Derivatives	3.4	0.0
Available for sale equity securities	0.6	0.6
Other assets | Level 1
Asset Category
Available for sale equity securities	3.7	5.1
Accrued expenses and other liabilities | Level 2 | Foreign exchange and metals contracts not designated as hedging instruments | Not Designated as Hedging Instrument
Liability Category
Derivatives	7.3	10.7
Accrued expenses and other liabilities | Level 2 | Interest rate swaps designated as cash flow hedging instruments | Designated as Hedging Instrument
Liability Category
Derivatives	2.8	10.2
Other liabilities | Level 2 | Interest rate swaps designated as cash flow hedging instruments | Designated as Hedging Instrument
Liability Category
Derivatives	0.8	0.0
Contingent consideration | Level 3
Liability Category
Long-term contingent consideration	$ 79.2	$ 75.8