PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Plan Asset) (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 08, 2020	Dec. 31, 2020	Dec. 31, 2019
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance		$ 835,139
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance		1,050,509	$ 835,139
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension asset		92,531
Pension and other postretirement liabilities		(7,715)	(6,690)
Accrued pension and other postretirement benefit costs		(98,345)	(138,635)
Pension Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Defined Benefit Plan, Plan Assets, Amount, Beginning Balance		835,139	738,296
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		105,810	133,896
Contributions made by employer	$ 150,000	155,359	3,867
DefinedBenefitPlanContributionsByPlanParticipants		1,366	1,276
DefinedBenefitPlanBenefitsPaid		(46,607)	(43,736)
Defined Benefit Plan, Plan Assets, Administration Expense		(1,526)	(1,846)
DefinedBenefitPlanSettlementsPlanAssets		(3,867)
DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets		4,835	3,386
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance		1,050,509	835,139
DefinedBenefitPlanFundedStatusOfPlan		6,474	(110,048)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension asset		92,554	11,711
Pension and other postretirement liabilities		(6,444)	(5,143)
Accrued pension and other postretirement benefit costs		(79,636)	(116,616)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet		6,474	(110,048)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax		294,545	263,660
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax		(321)	(934)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax		294,224	262,726
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation		114,297	881,731
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation		111,807	848,309
DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets		28,217	759,972
Other Postretirement Benefits Plan [Member]
DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Contributions made by employer		2,059	1,846
DefinedBenefitPlanContributionsByPlanParticipants		331	346
DefinedBenefitPlanBenefitsPaid		(2,390)	(2,192)
DefinedBenefitPlanFundedStatusOfPlan		(25,670)	(23,566)
DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Pension and other postretirement liabilities		(1,596)	(1,547)
Accrued pension and other postretirement benefit costs		(24,074)	(22,019)
DefinedBenefitPlanAmountsRecognizedInBalanceSheet		(25,670)	(23,566)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax		624	(2,429)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax		(747)	(1,404)
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax		$ (123)	$ (3,833)