XML 53 R39.htm IDEA: XBRL DOCUMENT
v3.22.0.1

ORGANIZATION AND OPERATIONS (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 segment
Noncontrolling Interest [Line Items] |
Number of reportable segments | 1
BVRT Water Company |
Noncontrolling Interest [Line Items] |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 24.80%

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_MinorityInterestLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_OwnershipAxis=cwt_BVRTWaterCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |