CONTINGENCIES AND COMMITMENTS (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit, outstanding	$ 21.0		$ 17.0
FinancialStandbyLetterOfCreditMember
Loss Contingencies [Line Items]
Letters of credit, outstanding	14.0		$ 3.0
Surety Bond [Member]
Loss Contingencies [Line Items]
Surety Bond Outstanding	35.0
AP1000
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded to Other Party	$ 10.0	$ 15.0