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Commitments Commitments 2 (Details) - BVESI | 12 Months Ended
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Dec. 31, 2022 unit
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Number of renewable energy credits that would be purchased | 578,000
Minimum |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Derivative, Term of Contract | 3 years
Maximum |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |
Derivative, Term of Contract | 5 years

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- Definition Represents the number of renewable energy credits that would be purchased over a contractual period of time. + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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- Details
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- Details
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- Details
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