SUBSEQUENT EVENT	12 Months Ended
Dec. 31, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT 2021 GRC On January 24, 2024, the assigned CPUC Administrative Law Judges (ALJs) issued a proposed decision (PD) on the litigated 2021 GRC, and concurrently, the assigned CPUC Commissioner issued an alternate proposed decision (APD) opposing and modifying certain decisions made by the ALJs. The PD issued by the ALJs was closer aligned to Cal Water’s requested revenue requirement whereas the APD issued by the assigned Commissioner was closer aligned to the Public Advocates’ requested revenue requirement. On February 13, 2024, Cal Water filed a request to change several elements in the PD and APD, including correction of possible 2021 GRC technical issues. The Company is unable to determine which of the two proposed decisions will be adopted by the CPUC, or if a second alternate proposed decision will be issued by the CPUC. As a result of the uncertainty of the decision that will ultimately be made by the CPUC, the Company is unable to reasonably estimate the impact on 2023 operating revenue and expenses. The 2021 GRC cumulative adjustment plus interest which is retroactive to January 1, 2023, will be recorded when the final decision is issued by the CPUC.

SUBSEQUENT EVENT

12 Months Ended

Dec. 31, 2023

2021 GRC

On January 24, 2024, the assigned CPUC Administrative Law Judges (ALJs) issued a proposed decision (PD) on the litigated 2021 GRC, and concurrently, the assigned CPUC Commissioner issued an alternate proposed decision (APD) opposing and modifying certain decisions made by the ALJs. The PD issued by the ALJs was closer aligned to Cal Water’s requested revenue requirement whereas the APD issued by the assigned Commissioner was closer aligned to the Public Advocates’ requested revenue requirement. On February 13, 2024, Cal Water filed a request to change several elements in the PD and APD, including correction of possible 2021 GRC technical issues. The Company is unable to determine which of the two proposed decisions will be adopted by the CPUC, or if a second alternate proposed decision will be issued by the CPUC. As a result of the uncertainty of the decision that will ultimately be made by the CPUC, the Company is unable to reasonably estimate the impact on 2023 operating revenue and expenses. The 2021 GRC cumulative adjustment plus interest which is retroactive to January 1, 2023, will be recorded when the final decision is issued by the CPUC.