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Debt and Credit Arrangements - Interest Expense and Financing Cost Amortization (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Debt Instrument        
Financing costs amortization $ 0.7 $ 1.1 $ 1.4 $ 2.3
Revolving Credit Facility        
Debt Instrument        
Interest expense, debt 5.0 1.8 8.3 3.1
Financing costs amortization 0.4 0.8 0.9 1.8
Revolving Credit Facility | Senior secured revolving credit facility due October 2026        
Debt Instrument        
Interest expense, debt 5.0 0.0 8.3 0.0
Financing costs amortization 0.4 0.0 0.9 0.0
Revolving Credit Facility | Term long due June 2024        
Debt Instrument        
Interest expense, debt 0.0 0.5 0.0 1.1
Financing costs amortization 0.0 0.8 0.0 1.8
Revolving Credit Facility | Interest expense, senior secured revolving credit facilities due 2024        
Debt Instrument        
Interest expense, debt $ 0.0 $ 1.3 $ 0.0 $ 2.0