Inventories (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Percentage Of LIFO Inventory To Total Inventory | 32.00% | 27.00% |
| Raw materials, work-in-process, and supplies | $ 4,335 | $ 4,005 |
| Finished products | 6,823 | 5,254 |
| Total inventories under FIFO | 11,158 | 9,259 |
| LIFO adjustment | (939) | (940) |
| Total inventories | $ 10,219 | $ 8,319 |