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Contingencies	12 Months Ended
	Dec. 31, 2020
Legal Proceedings [Abstract]
Contingencies	ContingenciesSJW Group and its subsidiaries are subject to ordinary routine litigation incidental to its business. There are no pending legal proceedings to which SJW Group or any of its subsidiaries is a party, or to which any of its properties is the subject, that are expected to have a material effect on SJW Group’s business, financial position, results of operations or cash flows.

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- Definition

Legal Proceedings [Abstract]

+ References

No definition available.

+ Details

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- Definition

The entire disclosure for legal proceedings, legal contingencies, litigation, regulatory and environmental matters and other contingencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-URI http://asc.fasb.org/topic&trid=2127136

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