OTHER LIABILITIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Asset Retirement Obligation [Roll forward]
Balance at beginning of year	$ 74	$ 80
Liabilities settled	(8)	(6)
Adjustments	3	(2)
Accretion expense	2	2
Balance at end of year	71	74
Other Liabilities Noncurrent [Abstract]
Pension and other employee related	4,440	4,308
Environmental	350	420
Income taxes	550	856
Insurance	273	218
Asset retirement obligations	71	74
Deferred income	47	77
Other	182	205
Total other liabilities	$ 5,913	$ 6,158