Fair Value Measurements and Risk - Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Asset Derivatives
Total derivatives	$ 3.9	$ 8.8
Liability Derivatives
Total derivatives	5.4	6.9
Designated as Hedging Instrument | Other current assets
Asset Derivatives
Currency contracts	3.5	4.0
Interest rate contracts	0.0	0.0
Designated as Hedging Instrument | Other assets
Asset Derivatives
Currency contracts	0.3	4.0
Interest rate contracts	0.0	0.0
Designated as Hedging Instrument | Other current liabilities
Liability Derivatives
Currency contracts	0.3	0.0
Interest rate derivatives	2.1	2.8
Designated as Hedging Instrument | Other liabilities
Liability Derivatives
Currency contracts	0.0	0.0
Interest rate derivatives	2.9	3.2
Not Designated as Hedging Instrument | Other current assets
Asset Derivatives
Currency contracts	0.1	0.8
Not Designated as Hedging Instrument | Other current liabilities
Liability Derivatives
Currency contracts	$ 0.1	$ 0.9