Supplemental Data (Summary of Inventories) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventory
Raw materials	$ 345	$ 329
Work in process	213	203
Finished goods	1,105	1,030
Supplies and other	303	280
Gross inventories	1,966	1,842
Excess of FIFO or weighted-average cost over LIFO cost	(176)	(163)
Total	1,790	1,679
LIFO
Inventory
Raw materials	87	93
Work in process	110	114
Finished goods	421	430
Supplies and other	0	0
Gross inventories	618	637
Excess of FIFO or weighted-average cost over LIFO cost	(176)	(163)
Total	442	474
Non- LIFO
Inventory
Raw materials	258	236
Work in process	103	89
Finished goods	684	600
Supplies and other	303	280
Gross inventories	1,348	1,205
Excess of FIFO or weighted-average cost over LIFO cost	0	0
Total	$ 1,348	$ 1,205

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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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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