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