CONTINGENCIES (Environmental Obligations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance at beginning of year	$ 1,167,000,000		$ 1,222,000,000		$ 1,453,000,000
Accretion Expense	77,000,000	[1]	79,000,000	[1]	80,000,000	[1]
Additions	16,000,000		73,000,000		70,000,000
Reductions	(6,000,000)	[2]	(77,000,000)	[2]	(182,000,000)	[2]
Spending	(80,000,000)		(130,000,000)		(199,000,000)
Balance at end of year	1,174,000,000		1,167,000,000		1,222,000,000
Less current portion	(105,000,000)		(121,000,000)		(186,000,000)
Long-term portion	1,069,000,000		1,046,000,000		1,036,000,000
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
2015	105,000,000
2016	151,000,000
2017	120,000,000
2018	108,000,000
2019	79,000,000
Thereafter	1,800,000,000
Estimated Environmental Obligations on a Discounted Fair Value Basis	1,100,000,000
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	2,400,000,000
Recorded environmental obligations for most significant sites	1,000,000,000
Minimum [Member]
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	2,000,000,000
Maximum [Member]
Estimated environmental cash payments (on an undiscounted and unescalated basis) [Abstract]
Estimated Environmental Obligations on an Undiscounted and Unescalated Basis	$ 2,600,000,000

[1] Represents accretion of the fair value of environmental obligations assumed in the 2007 acquisition of FMC, which were determined on a discounted cash flow basis.

[2] Reductions primarily reflect revisions for changes in the anticipated scope and timing of projects and other noncash adjustments.