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Supplemental Balance Sheet Data - Inventory (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Raw materials $ 339 $ 397
Work in process 200 203
Finished goods 1,074 1,214
Supplies and other 283 278
Inventory, Gross 1,896 2,092
Excess of FIFO or weighted-average cost over LIFO cost (160) (183)
Total 1,736 1,909
LIFO    
Raw materials 90 100
Work in process 106 110
Finished goods 442 525
Supplies and other 0 0
Inventory, Gross 638 735
Excess of FIFO or weighted-average cost over LIFO cost (160) (183)
Total 478 552
Non-LIFO    
Raw materials 249 297
Work in process 94 93
Finished goods 632 689
Supplies and other 283 278
Inventory, Gross 1,258 1,357
Excess of FIFO or weighted-average cost over LIFO cost 0 0
Total $ 1,258 $ 1,357