Supplemental Data Supplemental Data (Summary of Cash Flow Effects of Decrease (Increase) in Operating Working Capital) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts Receivable	$ (169)	$ 45	$ (20)	[1]
Inventories	9	(341)	523	[1]
Prepaid Expense	(19)	10	(1)	[1]
Trade Accounts Payable	161	263	278	[1]
Accrued Expenses	(91)	(122)	201	[1]
Accrued Income Taxes	(107)	180	(27)	[1]
Derivatives	33	(61)	116	[1]
Currency	(79)	50	35	[1]
Decrease (increase) in operating working capital	$ (262)	$ 24	$ 1,105	[1]

[1] Excludes the effects of acquisitions and dispositions.