XML 57 R47.htm IDEA: XBRL DOCUMENT v3.25.1

Fair Value of Financial Assets and Liabilities - Narrative (Details)	3 Months Ended
	Mar. 31, 2025
Fair Value Disclosures [Abstract]
Risk premium (as a percent)	0.70%

X

- Definition

Represents the risk premium rate as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	cwt_FairValueInputsRiskPremium
Namespace Prefix:	cwt_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration