Supplemental Balance Sheet Data - Inventory (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Raw materials	$ 478	$ 462
Work in process	291	286
Finished goods	1,439	1,401
Supplies and other	328	326
Inventory, Gross	2,536	2,475
Excess of FIFO or weighted-average cost over LIFO cost	(251)	(242)
Total	2,285	2,233
LIFO [Member]
Raw materials	147	143
Work in process	190	189
Finished goods	669	648
Supplies and other	0	0
Inventory, Gross	1,006	980
Excess of FIFO or weighted-average cost over LIFO cost	(251)	(242)
Total	755	738
Non-LIFO [Member]
Raw materials	331	319
Work in process	101	97
Finished goods	770	753
Supplies and other	328	326
Inventory, Gross	1,530	1,495
Excess of FIFO or weighted-average cost over LIFO cost	0	0
Total	$ 1,530	$ 1,495