COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 748	$ 754
Number of of Proprerties Remediated, City of Midland	86
Total Number of Properties to be Remediated, City of Midland	98
Accrual For Environmental Loss Contingencies Superfund Sites [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	76	69
Accrual For Environmental Loss Contingencies Midland Offsite Matters [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 51	$ 42