Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Trade accounts receivable, allowance for doubtful accounts $ 9.4 $ 7.5
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, Authorized shares 10,000,000 10,000,000
Preferred stock, Issued shares 0 0
Common stock, par value $ 1.25 $ 1.25
Common stock, Authorized shares 300,000,000 300,000,000
Common stock, Issued shares 189,300,000 189,300,000
Common stock, Outstanding shares 119,000,000 118,700,000
Treasury stock, shares 69,700,000 70,000,000
Stock held by employee benefits trusts, shares 600,000 600,000