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Financial Instruments, Risk Management and Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Estimate of Fair Value Measurement      
Derivative [Line Items]      
Long-term debt value $ 253.1   $ 154.6
Reported Value Measurement      
Derivative [Line Items]      
Long-term debt value 208.7   $ 154.6
Not Designated as Hedging Instrument | Foreign currency contracts      
Derivative [Line Items]      
Open foreign currency forward contracts designated as cash flow hedges, U.S. dollar equivalent 47.4    
Designated as Hedging Instrument | Foreign currency contracts      
Derivative [Line Items]      
Net after-tax loss position 0.2    
Open foreign currency forward contracts designated as cash flow hedges, U.S. dollar equivalent $ 13.0    
Designated as Hedging Instrument | Foreign currency contracts | Forecast      
Derivative [Line Items]      
Loss on derivative   $ 0.2