XML 109 R93.htm IDEA: XBRL DOCUMENT v3.20.4
Debt and Credit Facilities - Lines of Credit (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Line of Credit Facility [Line Items]    
Used lines of credit $ 7.2 $ 98.9
Unused lines of credit 1,312.0 1,245.2
Total available lines of credit 1,319.2 $ 1,344.1
Committed Line Of Credit Facilities    
Line of Credit Facility [Line Items]    
Total available lines of credit $ 1,145.5