Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 11.2 $ 12.9
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, Authorized shares (in shares) 10,000,000.0 10,000,000.0
Preferred stock, Issued shares (in shares) 0 0
Common stock, par value (in dollars per share) $ 1.25 $ 1.25
Common stock, Authorized shares (in shares) 300,000,000.0 300,000,000.0
Common stock, Issued shares (in shares) 189,300,000 189,300,000
Common stock, Outstanding shares (in shares) 121,800,000 121,800,000
Treasury stock, shares (in shares) 66,900,000 66,900,000
Stock held by employee benefits trusts, shares (in shares) 600,000 600,000