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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Preferred stock, par value (in usd per share) $ 1 $ 1
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Common stock, par value (in usd per share) $ 0.25 $ 0.25
Common stock, shares authorized 600,000,000 600,000,000
Common stock, shares issued 372,726,000 356,572,000
Treasury stock, shares 3,000 0