Financial Instruments and Risk Management (Derivatives Not Designated as Hedging Instruments Fair Values of Derivative Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	$ 144.6	$ 118.6
Liability derivatives, fair value	61.0	103.6
Not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	82.6	90.3
Liability derivatives, fair value	56.7	102.8
Not designated as hedging instrument | Prepaid expenses and other current assets | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	82.6	90.3
Not designated as hedging instrument | Other current liabilities | Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Liability derivatives, fair value	$ 56.7	$ 102.8