Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for credit loss $ 12.9 $ 11.2
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, authorized (in shares) 10,000,000.0 10,000,000.0
Preferred stock, issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 1.25 $ 1.25
Common stock, authorized (in shares) 300,000,000.0 300,000,000.0
Common stock, issued (in shares) 189,300,000 189,300,000
Common stock, outstanding (in shares) 121,800,000 121,200,000
Treasury stock (in shares) 66,900,000 67,500,000
Stock held by employee benefit trusts (in shares) 600,000 600,000