XML 38 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 30, 2024
Cover [Abstract]      
Entity Registrant Name AVISTA CORPORATION    
Amendment Flag false    
Document Transition Report false    
Document Annual Report true    
Document Type 10-K    
Document Period End Date Dec. 31, 2024    
Entity File Number 001-03701    
Entity Tax Identification Number 91-0462470    
Entity Incorporation, State or Country Code WA    
Entity Address, Address Line One 1411 East Mission Avenue    
Entity Address, City or Town Spokane    
Entity Address, State or Province WA    
Entity Address, Postal Zip Code 99202-2600    
City Area Code 509    
Local Phone Number 489-0500    
Title of 12(b) Security Common Stock    
Trading Symbol AVA    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 2,723,880,269
Entity Common Stock, Shares Outstanding   80,126,259  
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000104918    
Current Fiscal Year End Date --12-31    
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference

Documents Incorporated By Reference

Document

 

Part of Form 10-K into Which

Document is Incorporated

Proxy Statement to be filed in connection with the annual meeting of shareholders to be held on May 8, 2025.

Prior to such filing, the Proxy Statement was filed in connection with the annual meeting of shareholders held on May 1, 2024.

 

Part III, Items 10, 11,

12, 13 and 14
   
Auditor Name Deloitte & Touche LLP    
Auditor Location Portland, Oregon    
Auditor Firm ID 34    
Auditor Opinion

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Avista Corporation and subsidiaries (the "Company") as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income, equity, and cash flows, for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2025, expressed an unqualified opinion on the Company's internal control over financial reporting.