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Regulatory Matters - Narative (Details) | 3 Months Ended
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Mar. 31, 2022 USD ($)
Regulatory matters: |
Regulatory asset not accruing carrying costs | $ (63,100,000)
Amount billed to customers as surcharges | 0
Water Revenue Adjustment Mechanism and Modified Cost Balancing Account |
Regulatory matters: |
Increase (decrease) in other regulatory assets | $ 8,800,000
Regulatory asset recovery periods | 24 months
Excess deferred income taxes |
Regulatory matters: |
Regulatory asset not accruing carrying costs | $ (76,700,000)
Flow-through taxes, net |
Regulatory matters: |
Regulatory asset not accruing carrying costs | (5,800,000)
Pension and other post-retirement obligations |
Regulatory matters: |
Regulatory asset not accruing carrying costs | (25,100,000)
Derivative unrealized (gain) loss |
Regulatory matters: |
Regulatory asset not accruing carrying costs | $ (7,000,000)
GSWC |
Regulatory matters: |
Number of unresolved issues for the Water General Rate Case | 3
GSWC | Cost of capital proceeding |
Regulatory matters: |
Average cost of debt rate requested (percent) | 5.10%
Average cost of debt rate, current (percent) | 6.60%
Revenue impact due to lower cost of debt | $ (1,400,000)
GSWC | Water Revenue Adjustment Mechanism and Modified Cost Balancing Account |
Regulatory matters: |
Commercial paper, term | 90 days
BVESI |
Regulatory matters: |
Regulatory asset CEMA - storm | $ 448,000

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- Definition Number of unresolved issues for 2022-2024 Water General Rate Case + References No definition available. + Details
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- Definition Represents amount billed to customers as surcharges. + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Regulatory asset CEMA - Storm + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents the regulatory asset not accruing carrying costs as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents the recovery periods of the surcharge billed to the customers. + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Namespace Prefix: | awr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Regulatory Rate Filings Average Cost Of Debt Rate Current + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Regulatory Rate Filings, Average Cost Of Debt Rate, Requested + References No definition available. + Details
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- Definition Revenue impact due to lower cost of debt + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The increase (decrease) during the reporting period in the value of other assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Details
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- Details
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Balance Type: |
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- Details
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