Financial Instruments and Risk Management (Effect of Derivative Instruments on the Condensed Consolidated Balance Sheets Fair Value of Derivative Instruments Derivatives Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	$ 73.3	$ 106.2
Fair value of financial instruments	70.1	124.6
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	35.9	17.5
Fair value of financial instruments	10.0	35.8
Designated as Hedging Instrument | Prepaid expenses and other current assets | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	35.9	17.5
Designated as Hedging Instrument | Other Current Liabilities [Member] | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	10.0	35.8
Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	37.4	88.7
Fair value of financial instruments	60.1	88.8
Not Designated as Hedging Instruments | Prepaid expenses and other current assets | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	37.4	88.7
Not Designated as Hedging Instruments | Other Current Liabilities [Member] | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair value of financial instruments	$ 60.1	$ 88.8