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INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Federal statutory rate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal benefit 3.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.70%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 3.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Foreign income tax rate differential (0.90%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (2.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (4.60%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Audit settlements (2.40%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements (0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements (11.80%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlements
Effect of tax law changes 1.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Nondeductible legal and related expenses 18.70%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense 0.80%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense 0.20%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Basis difference in affiliates (2.50%)us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary (9.20%)us-gaap_EffectiveIncomeTaxRateReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary
Tax advantaged investments (5.20%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome (4.20%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome (12.40%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome
Other, net 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate 47.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 30.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations
DTA change in enacted tax rate $ 210c_DeferredTaxAssetsChangeInEnactedTaxRate    
Tax benefit for the resolution of certain tax items $ 347us-gaap_IncomeTaxReconciliationTaxSettlements $ 127us-gaap_IncomeTaxReconciliationTaxSettlements