Supplemental Balance Sheet Data - Inventory (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Raw materials	$ 292	$ 321
Work in process	177	206
Finished goods	952	1,147
Supplies and other	265	271
Inventory, Gross	1,686	1,945
Inventory, LIFO Reserve	(147)	(155)
Total	1,539	1,790
LIFO
Raw materials	87	85
Work in process	102	113
Finished goods	417	451
Supplies and other	0	0
Inventory, Gross	606	649
Inventory, LIFO Reserve	(147)	(155)
Total	459	494
Non-LIFO
Raw materials	205	236
Work in process	75	93
Finished goods	535	696
Supplies and other	265	271
Inventory, Gross	1,080	1,296
Inventory, LIFO Reserve	0	0
Total	$ 1,080	$ 1,296

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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