PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Plan Assumptions) (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member]
DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract
Discount rate	3.05%	4.09%
Rate Of Compensation Increase	3.46%	3.50%
DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract
Discount Rate	4.09%	3.46%
Expected return on assets assumption	7.59%	7.47%
Net Periodic Benefit Cost Rate Of Compensation Increase	3.50%	3.50%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Year That Rate Reaches Ultimate Trend Rate	2026	2026
DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract
Discount rate	3.15%	4.20%
DefinedBenefitPlanAssumedHealthCareCostTrendRatesAbstract
Rate Assumed For Next Fiscal Year	7.50%	7.85%
Ultimate Health Care Cost Trend Rate	4.50%	4.50%
DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract
Discount Rate	4.20%	3.54%
Defined Benefit Plan Assumed Health Care Cost Trend Rates Net Periodic [Abstract]
Rate Assumed for Next Fiscal Year	7.85%	8.30%
Ultimate Health Care Cost Trend Rate	4.50%	4.50%