COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 739	$ 722
Number of of Properties Remediated, City of Midland		98
Total Number of Properties to be Remediated, City of Midland	25
Accrual For Environmental Loss Contingencies Superfund Sites [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	78	73
Accrual For Environmental Loss Contingencies Midland Offsite Matters [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 49	$ 47