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Debt including Finance Lease Obligations - Long-term Debt (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Line of Credit Facility    
Total debt including finance lease obligations $ 1,160.8 $ 1,280.5
Less: debt issuance costs 6.7 10.9
Total debt, including finance lease obligations, net of debt issuance costs 1,154.1 1,269.6
Less: debt maturing within one year 0.9 19.6
Long-term debt including finance lease obligations 1,153.2 1,250.0
Revolving Credit Facility and other lines of credit    
Line of Credit Facility    
Total debt including finance lease obligations 509.0 0.0
Letters of credit outstanding 2.3 2.5
Available under the facility 488.7 497.5
Term Loan    
Line of Credit Facility    
Total debt including finance lease obligations $ 0.0 328.1
Senior Notes | 3.88% Senior Notes due 2028    
Line of Credit Facility    
Interest rate 3.88%  
Total debt including finance lease obligations $ 550.0 550.0
Senior Notes | 4.50% Senior Notes due 2026    
Line of Credit Facility    
Interest rate 4.50%  
Total debt including finance lease obligations $ 0.0 300.0
Finance lease obligations    
Line of Credit Facility    
Total debt including finance lease obligations $ 101.8 $ 102.4