FAIR VALUE MEASUREMENTS (Additional Information) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended				9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Significant Unobservable Inputs (Level 3) [Member]		Sep. 30, 2011 Significant Unobservable Inputs (Level 3) [Member]		Sep. 30, 2012 Significant Unobservable Inputs (Level 3) [Member]		Sep. 30, 2011 Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period, fair value measurements using Level 3 inputs			$ 1,220	[1]	$ 1,389	[1]	$ 1,141	[1]	$ 1,267	[1]
Loss included in earnings, fair value measurements using Level 3 inputs			(2)	[1],[2]	(1)	[1],[2]	(4)	[1],[2]	(6)	[1],[2]
Purchases, fair value measurements using Level 3 inputs			343	[1]	149	[1]	2,396	[1]	1,500	[1]
Settlements, fair value measurements using Level 3 inputs			(218)	[1]	(292)	[1]	(2,190)	[1]	(1,516)	[1]
Balance at end of period, fair value measurements using Level 3 inputs			1,343	[1]	1,245	[1]	1,343	[1]	1,245	[1]
Derivative, Fair Value, Amount Offset Against Collateral, Net	$ 12	$ 11

[1] Included in “Accounts and notes receivable – Other” in the consolidated balance sheets.

[2] Included in “Selling, general and administrative expenses” in the consolidated statements of income.