PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Additional) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Contribution, Percentage, Maximum			7.00%
Defined Contribution Plan, Cost	$ 4.3	$ 4.3	$ 9.6	$ 10.3
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 13.9
Forecast [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount					$ 19.0