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Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Revenue $ 764 $ 631
Operating expenses:    
Cost of products 616 517
Warehousing, selling and administrative 141 135
Operating profit (loss) 7 (21)
Other expense (4) (2)
Income (loss) before income taxes 3 (23)
Income tax provision (benefit) 1  
Net income (loss) $ 2 $ (23)
Earnings (loss) per share:    
Basic earnings (loss) per common share $ 0.02 $ (0.21)
Diluted earnings (loss) per common share $ 0.02 $ (0.21)
Weighted-average common shares outstanding, basic 108,074,718 107,550,846
Weighted-average common shares outstanding, diluted 108,172,759 107,550,846