XML 75 R51.htm IDEA: XBRL DOCUMENT v3.23.3

Leases - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 MW
Lancaster Power Purchase Agreement [Member]
Lessee, Lease, Description [Line Items]
Evaluated Power Capacity	270

X

- Definition

Evaluated Power Capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	ava_
Data Type:	dtr-types:powerItemType
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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

+ Details

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

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- Details

Name:	us-gaap_LeaseContractualTermAxis=ava_LancasterPowerPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: