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Inventories (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Inventory, finished goods, work-in-process, and raw materials and supplies [Abstract]      
Finished goods $ 2,368 $ 2,368 $ 3,083
Work-in-process 139 139 130
Raw materials and supplies 1,261 1,261 1,375
Total inventories 3,768 3,768 $ 4,588
LCM inventory valuation charge (benefit) $ (96) $ 323