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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Capital expenditures incurred but not yet paid $ 12.6 $ 3.5  
Treasury repurchased but not yet paid 17.2    
Other Current Assets [Member]      
Restricted Cash 1.2 1.0 $ 1.0
Other Assets [Member]      
Restricted Cash $ 3.7 $ 5.2 $ 4.9