PENSION (Future Service) (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 47,290
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	50,630
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	51,553
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	52,747
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	52,039
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	274,612
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	45,604
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	48,937
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	49,859
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	51,058
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	50,361
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	266,582
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	1,686
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	1,693
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	1,694
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1,689
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	1,678
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 8,030