Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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

Subsequent Events (Details) - USD ($) $ in Millions	1 Months Ended	26 Months Ended
Subsequent Events (Details) - USD ($) $ in Millions	Apr. 29, 2026	Mar. 31, 2026
Subsequent Event [Line Items]
Proceeds from legal settlements		$ 25.1
SJWC
Subsequent Event [Line Items]
Proceeds from legal settlements		17.0
CWC
Subsequent Event [Line Items]
Proceeds from legal settlements		$ 7.6
Subsequent Event \| PFAS Litigation Settlement
Subsequent Event [Line Items]
Proceeds from legal settlements	$ 5.3
Subsequent Event \| PFAS Litigation Settlement \| SJWC
Subsequent Event [Line Items]
Proceeds from legal settlements	3.5
Subsequent Event \| PFAS Litigation Settlement \| CWC
Subsequent Event [Line Items]
Proceeds from legal settlements	$ 1.8