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OTHER FINANCIAL DATA - RABBI TRUST (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Rabbi Trust Disclosure [Abstract]    
Rabbi Trust $ 476us-gaap_AssetsHeldInTrustNoncurrent $ 512us-gaap_AssetsHeldInTrustNoncurrent [1]
[1]
Derived from audited financial statements.