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v3.20.2

Income Taxes - Additional Information (Details) $ in Millions | 1 Months Ended
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Oct. 31, 2020 USD ($)
Subsequent Event |
Effective Tax Rate Reconciliation [Line Items] |
Increase in deferred income tax | $ 62

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- Definition Effective tax rate reconciliation. + References No definition available. + Details
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Namespace Prefix: | ava_
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Balance Type: | na
Period Type: | duration

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- Definition The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa. + 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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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration

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- Details
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