Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Allowance for Credit Loss, Receivable, Other, Current $ 0.0 $ 4.6
Receivable, net of allowance for credit loss and other, noncurrent $ 0.0 $ 0.0
Preferred stock, par value (in dollar per share) $ 25 $ 25
Preferred stock, shares authorized (in shares) 500,000 500,000
Preferred stock, issued (in shares) 0 0
Common stock, par value (in dollar per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 160,000,000 160,000,000
Common stock, shares issued (in shares) 122,304,124 121,397,553
Common stock, shares outstanding (in shares) 103,743,163 104,346,233
Treasury stock, common shares (in shares) 18,560,961 17,051,320
Nonrelated Party    
Receivable, net of allowance for credit loss and other, current $ 0.7 $ 0.5
Related Party    
Receivable, net of allowance for credit loss and other, current $ 1.2 $ 0.8