Inventories (Summary Of Inventories) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Raw materials	$ 535	$ 497
Work in process	327	371
Finished goods	1,443	1,468
Supplies and other	310	300
Gross inventories	2,615	2,636
Excess of FIFO or weighted-average cost over LIFO cost	(247)	(280)
Total	2,368	2,356
LIFO [Member]
Raw materials	169	163
Work in process	206	245
Finished goods	676	708
Supplies and other	0	0
Gross inventories	1,051	1,116
Excess of FIFO or weighted-average cost over LIFO cost	(247)	(280)
Total	804	836
Non-LIFO [Member]
Raw materials	366	334
Work in process	121	126
Finished goods	767	760
Supplies and other	310	300
Gross inventories	1,564	1,520
Excess of FIFO or weighted-average cost over LIFO cost	0	0
Total	$ 1,564	$ 1,520