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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accumulated Other Comprehensive Income Loss [Abstract]      
Cumulative foreign exchange translation adjustment $ (740,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ 304,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax  
Pension and other postretirement benefit adjustments (728,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax 355,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax  
Fair value of available for sale investments 0us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 170,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax  
Fair value of effective cash flow hedges 9,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax (11,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax  
Accumulated Other Comprehensive Income (Loss) (1,459,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 818,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (1,339,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract]      
Foreign exchange translation adjustment (1,044,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax (52,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax 282,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax
Pension and other postretirement benefit adjustments (1,707,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax 3,514,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax (285,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
Changes in fair value of available for sale investments (246,000,000)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax 30,000,000us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax 54,000,000us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
Changes in fair value of effective cash flow hedges 24,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax (14,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax 35,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax
Changes in accumulated other comprehensive income, pretax (2,973,000,000)us-gaap_OtherComprehensiveIncomeLossBeforeTax 3,478,000,000us-gaap_OtherComprehensiveIncomeLossBeforeTax 86,000,000us-gaap_OtherComprehensiveIncomeLossBeforeTax
Other Comprehensive Income Loss Tax [Abstract]      
Foreign exchange translation adjustment 0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax 0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax 0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Pensions and other postretirement benefit adjustments 624,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax (1,311,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax 87,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Changes in fair value of available for sale investments 76,000,000us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax (17,000,000)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax (60,000,000)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
Changes in fair value of effective cash flow hedges (4,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax 7,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax (8,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
Other comprehensive income (loss), tax 696,000,000us-gaap_OtherComprehensiveIncomeLossTax (1,321,000,000)us-gaap_OtherComprehensiveIncomeLossTax 19,000,000us-gaap_OtherComprehensiveIncomeLossTax
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease Abstract      
Foreign exchange translation adjustment (1,044,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax (52,000,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 282,000,000us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Pensions and other postretirement benefit adjustments (1,083,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax 2,203,000,000us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax (198,000,000)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Changes in fair value of available for sale investments (170,000,000)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 13,000,000us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax (6,000,000)us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Changes in fair value of effective cash flow hedges 20,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax (7,000,000)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax 27,000,000us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
Components of other comprehensive income (loss), net of tax $ (2,277,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 2,157,000,000us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 105,000,000us-gaap_OtherComprehensiveIncomeLossNetOfTax