OTHER LIABILITIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Asset Retirement Obligation [Roll forward]
Balance at beginning of year	$ 80	$ 79
Liabilities settled	(6)	(3)
Adjustments	(2)	2
Accretion expense	2	2
Balance at end of year	74	80
Other Liabilities Noncurrent [Abstract]
Pension and other employee related	4,308	4,216
Environmental	420	425
Income taxes	856	562
Insurance	218	177
Asset retirement obligations	74	80
Deferred income	77	94
Other	205	344
Total other liabililities	$ 6,158	$ 5,898