Derivative Instruments Derivative Instruments - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative asset, fair value	$ 2.5	$ 5.3
Derivative liability, fair value	9.9	7.1
Designated as hedge
Derivative [Line Items]
Derivative asset, fair value	2.5	5.2
Derivative liability, fair value	9.7	6.6
Other current assets | Non-designated derivatives
Derivative [Line Items]
Derivative asset, fair value	0.0	0.1
Other accrued liabilities | Non-designated derivatives
Derivative [Line Items]
Derivative liability, fair value	0.2	0.5
Cash flow hedges | Other current assets | Designated as hedge | Foreign exchange contracts
Derivative [Line Items]
Derivative asset, fair value	2.2	5.2
Cash flow hedges | Other long-term assets | Designated as hedge | Foreign exchange contracts
Derivative [Line Items]
Derivative asset, fair value	0.3	0.0
Cash flow hedges | Other accrued liabilities | Designated as hedge | Foreign exchange contracts
Derivative [Line Items]
Derivative liability, fair value	6.6	6.6
Fair Value Hedging | Other long-term liabilities | Designated as hedge | Interest Rate Swap
Derivative [Line Items]
Derivative liability, fair value	$ 3.1	$ 0.0