XML 68 R54.htm IDEA: XBRL DOCUMENT v3.20.2
Debt - Credit Agreement (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Line of Credit Facility [Line Items]    
Long-term debt, gross $ 256.4 $ 258.0
Long-term debt, current 2.3 2.3
Long-term debt 253.4 255.0
Revolving credit facility, Due 2024    
Line of Credit Facility [Line Items]    
Line of credit facility, current borrowing capacity 300.0  
Line of credit Facility, unused commitment level 297.5  
Revolving credit facility, Due 2024 | Letter of Credit    
Line of Credit Facility [Line Items]    
Long-term line of credit 2.5  
Term Loan Due 2024    
Line of Credit Facility [Line Items]    
Long-term debt, gross 88.4 $ 90.0
Long-term debt, current 2.3  
Long-term debt $ 86.1