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COMMITMENTS AND CONTINGENT LIABILITIES (Asset Retirement Obligations) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Asset Retirement Obligation Discount rate	1.96%	1.96%
Asset Retirement Obligation Unconditional [Member]
Loss Contingencies [Line Items]
Asset Retirement Obligation	4	4
Asset Retirement Obligation Conditional [Member]
Loss Contingencies [Line Items]
Asset Retirement Obligation	9	10

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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