Supplemental Balance Sheet Data - Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Raw materials	$ 375	$ 321
Work in process	199	206
Finished goods	1,116	1,147
Supplies and other	242	271
Inventory, Gross	1,932	1,945
Inventory, LIFO Reserve	(145)	(155)
Total	1,787	1,790
LIFO
Raw materials	124	85
Work in process	110	113
Finished goods	433	451
Supplies and other	0	0
Inventory, Gross	667	649
Inventory, LIFO Reserve	(145)	(155)
Total	522	494
Non-LIFO
Raw materials	251	236
Work in process	89	93
Finished goods	683	696
Supplies and other	242	271
Inventory, Gross	1,265	1,296
Inventory, LIFO Reserve	0	0
Total	$ 1,265	$ 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 raw materials 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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