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PENSION (Asset Class) (Detail)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Domestic Equities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
DefinedBenefitPlanWeightedAverageAssetAllocations 54.00% 51.00%
DefinedBenefitPlanTargetPlanAssetAllocations 50.00%  
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum   40.00%
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum   60.00%
International Equities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
DefinedBenefitPlanWeightedAverageAssetAllocations 13.00% 14.00%
DefinedBenefitPlanTargetPlanAssetAllocations 15.00%  
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum   10.00%
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum   20.00%
EquitySecuritiesMember    
Defined Benefit Plan Disclosure [Line Items]    
DefinedBenefitPlanWeightedAverageAssetAllocations 67.00% 65.00%
DefinedBenefitPlanTargetPlanAssetAllocations 65.00%  
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum   55.00%
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum   75.00%
FixedIncomeFundsMember    
Defined Benefit Plan Disclosure [Line Items]    
DefinedBenefitPlanWeightedAverageAssetAllocations 33.00% 35.00%
DefinedBenefitPlanTargetPlanAssetAllocations 35.00%  
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMinimum   25.00%
DefinedBenefitPlanTargetPlanAssetAllocationsRangeMaximum   45.00%