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Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)
Loss Contingencies [Line Items]
Proceeds from legal settlements	$ 25.1
Receivable period for noncurrent cash proceeds receivable form legal settlement	8 years
SJWC
Loss Contingencies [Line Items]
Proceeds from legal settlements	$ 17.0
CWC
Loss Contingencies [Line Items]
Proceeds from legal settlements	7.6
MWC
Loss Contingencies [Line Items]
Proceeds from legal settlements	0.5
Settlement payable to contract operators	$ 0.3

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