COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 744	$ 733
Accrual For Environmental Loss Contingencies Midland Offsite Matters [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	41	40
Accrual For Environmental Loss Contingencies Superfund Sites [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 69	$ 69