COMMITMENTS AND CONTINGENCIES (Narrative) (Details) $ in Thousands		1 Months Ended							3 Months Ended		9 Months Ended
		Mar. 31, 2023 USD ($) item	Dec. 31, 2020	Jul. 31, 2018 item	Dec. 31, 2017	Sep. 30, 2017 item	Mar. 31, 2016 mi	May 31, 2007 entity mi	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) item	Sep. 30, 2023 USD ($) item	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Asset retirement obligations									$ 340,000	$ 315,200	$ 315,500	$ 311,600	$ 311,300	$ 321,100
Number of groundwater extraction wells | item						2
Contingency loss											0
Lease liabilities	[1]								$ 768,800		$ 614,700		$ 653,600
Vulcan Material [Member]
Loss Contingencies [Line Items]
Judge ruled allocation of fault among defendants, percentage			15.00%		15.00%				15.00%
Lawsuit Against CalMat Co [Member]
Loss Contingencies [Line Items]
Charge for litigation matter		$ 11,000
Estimated construction and operation of water treatment system		$ 100,000
Cases Allegedly Involving 1,1,1-Trichloroethane [Member]
Loss Contingencies [Line Items]
Number of cases | item											29
New York Water District Cases [Member]
Loss Contingencies [Line Items]
Number of cases | item											28
New Jersey Natural Resources Damages Case [Member]
Loss Contingencies [Line Items]
Number of cases | item											1
Cooperating Parties Group [Member]
Loss Contingencies [Line Items]
Number of other companies to perform a Remedial Investigation/ Feasibility Study related to the Lower Passaic River Clean-Up lawsuit | entity								70
Number of miles of the River used in the Remedial Investigation/Feasibility Study | mi								17
Number of miles for bank-to-bank dredging remedy | mi							8
Occidental Chemical Co [Member]
Loss Contingencies [Line Items]
Judge ruled allocation of fault among defendants, percentage			30.00%		50.00%
Occidental Chemical Co [Member] | Lawsuit Filed By Occidental [Member]
Loss Contingencies [Line Items]
Number of defendants | item		39		100
Texas Brine [Member]
Loss Contingencies [Line Items]
Judge ruled allocation of fault among defendants, percentage			55.00%		35.00%
LADWP [Member]
Loss Contingencies [Line Items]
Number of planned new treatment capabilities | item										2
Maximum [Member] | EPA [Member]
Loss Contingencies [Line Items]
Estimated implementation costs											$ 1,380,000
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Outstanding standby letters of credit											$ 83,200

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