Derivative Instruments Derivative Instruments - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative asset, fair value, gross asset	$ 89.0	$ 2.5
Derivative liability, fair value, gross liability	0.5	9.9
Designated derivatives:
Derivative [Line Items]
Derivative asset, fair value, gross asset	88.8	2.5
Derivative liability, fair value, gross liability	0.4	9.7
Other current assets | Non-designated derivatives
Derivative [Line Items]
Derivative asset, fair value, gross asset	0.2	0.0
Other accrued liabilities | Non-designated derivatives
Derivative [Line Items]
Derivative liability, fair value, gross liability	0.1	0.2
Cash flow hedges: | Other current assets | Designated derivatives: | Foreign exchange contracts
Derivative [Line Items]
Derivative asset, fair value, gross asset	27.8	2.2
Cash flow hedges: | Other long-term assets | Designated derivatives: | Foreign exchange contracts
Derivative [Line Items]
Derivative asset, fair value, gross asset	10.0	0.3
Cash flow hedges: | Other long-term assets | Designated derivatives: | Interest rate lock contracts
Derivative [Line Items]
Derivative asset, fair value, gross asset	30.7	0.0
Cash flow hedges: | Other long-term assets | Designated derivatives: | Interest rate swap contracts
Derivative [Line Items]
Derivative asset, fair value, gross asset	20.3	0.0
Cash flow hedges: | Other accrued liabilities | Designated derivatives: | Foreign exchange contracts
Derivative [Line Items]
Derivative liability, fair value, gross liability	0.2	6.6
Cash flow hedges: | Other long-term liabilities | Designated derivatives: | Foreign exchange contracts
Derivative [Line Items]
Derivative liability, fair value, gross liability	0.2	0.0
Fair value hedges: | Other long-term liabilities | Designated derivatives: | Interest rate swap contracts
Derivative [Line Items]
Derivative liability, fair value, gross liability	$ 0.0	$ 3.1