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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Condensed Consolidated Balance Sheets    
Accounts Receivable, Allowance for credit losses $ 0.6 $ 0.6
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 20,000,000 20,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 325,000,000 325,000,000
Common stock, shares issued (in shares) 126,182,945 125,998,967
Common stock, shares outstanding (in shares) 106,934,077 107,299,933
Common stock held in Treasury (in shares) 19,248,868 18,699,034