Supplemental Balance Sheet Data - Inventory (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Raw materials	$ 393	$ 394
Work in process	196	189
Finished goods	1,253	1,202
Supplies and other	270	263
Inventory, Gross	2,112	2,048
Inventory, LIFO Reserve	(156)	(145)
Total	1,956	1,903
LIFO
Raw materials	132	131
Work in process	112	103
Finished goods	532	453
Supplies and other	0	0
Inventory, Gross	776	687
Inventory, LIFO Reserve	(156)	(145)
Total	620	542
Non-LIFO
Raw materials	261	263
Work in process	84	86
Finished goods	721	749
Supplies and other	270	263
Inventory, Gross	1,336	1,361
Inventory, LIFO Reserve	0	0
Total	$ 1,336	$ 1,361

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 by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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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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