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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Allowances for discounts and doubtful accounts on receivables $ 28 $ 30
Common Stock, par value $ 0.01 $ 0.01
Common Stock, shares authorized 750,000,000.0 750,000,000.0
Common Stock, shares issued 191,900,000.0 191,400,000.0
Treasury Stock, shares 12,400,000.0 11,900,000.0