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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2024
Revenue from Contract with Customer [Abstract] |
Unbilled Accounts Receivable | Accounts receivable includes unbilled energy revenues of the following amounts as of December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |
Unbilled accounts receivable |  | $ | 75 |  |  | $ | 79 |
Schedule of Utilities Operating Revenue Expense Taxes | Utility-related taxes included in revenue from contracts with customers were as follows for the years ended December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |  |  | 2022 |
Utility-related taxes |  | $ | 81 |  |  | $ | 75 |  |  | $ | 70 |
Disaggregation of Revenue | Disaggregation of Total Operating Revenue The following table disaggregates total operating revenue by segment and source for the years ended December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |  |  | 2022 |
Avista Utilities |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  | $ | 1,570 |  |  | $ | 1,486 |  |  | $ | 1,400 |
Derivative revenues |  |  | 249 |  |  |  | 199 |  |  |  | 286 |
Alternative revenue programs |  |  | 35 |  |  |  | 5 |  |  |  | (34 | )
Other utility revenues |  |  | 33 |  |  |  | 13 |  |  |  | 11 |
Total Avista Utilities |  |  | 1,887 |  |  |  | 1,703 |  |  |  | 1,663 |
AEL&P |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  |  | 49 |  |  |  | 47 |  |  |  | 46 |
Other utility revenues |  |  | 1 |  |  |  | 1 |  |  |  | — |
Total AEL&P |  |  | 50 |  |  |  | 48 |  |  |  | 46 |
Other |  |  |  |  |  |  |  |  |
Other revenues |  |  | 1 |  |  |  | 1 |  |  |  | 1 |
Total operating revenues |  | $ | 1,938 |  |  | $ | 1,752 |  |  | $ | 1,710 |
Utility Revenue from Contracts with Customers by Type and Service The following table disaggregates revenue from contracts with customers associated with the Company's electric operations for the years ended December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |  |  | 2022 |
|  | Avista Utilities |  |  | AEL&P |  |  | Total Utility |  |  | Avista Utilities |  |  | AEL&P |  |  | Total Utility |  |  | Avista Utilities |  |  | AEL&P |  |  | Total Utility |
ELECTRIC OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 473 |  |  | $ | 22 |  |  | $ | 495 |  |  | $ | 425 |  |  | $ | 20 |  |  | $ | 445 |  |  | $ | 415 |  |  | $ | 20 |  |  | $ | 435 |
Commercial and governmental |  |  | 369 |  |  |  | 27 |  |  |  | 396 |  |  |  | 344 |  |  |  | 27 |  |  |  | 371 |  |  |  | 339 |  |  |  | 26 |  |  |  | 365 |
Industrial |  |  | 131 |  |  |  | — |  |  |  | 131 |  |  |  | 110 |  |  |  | — |  |  |  | 110 |  |  |  | 108 |  |  |  | — |  |  |  | 108 |
Public street and highway lighting |  |  | 9 |  |  |  | — |  |  |  | 9 |  |  |  | 8 |  |  |  | — |  |  |  | 8 |  |  |  | 7 |  |  |  | — |  |  |  | 7 |
Total retail revenue |  |  | 982 |  |  |  | 49 |  |  |  | 1,031 |  |  |  | 887 |  |  |  | 47 |  |  |  | 934 |  |  |  | 869 |  |  |  | 46 |  |  |  | 915 |
Transmission |  |  | 38 |  |  |  | — |  |  |  | 38 |  |  |  | 33 |  |  |  | — |  |  |  | 33 |  |  |  | 32 |  |  |  | — |  |  |  | 32 |
Other revenue from contracts with customers |  |  | 40 |  |  |  | — |  |  |  | 40 |  |  |  | 45 |  |  |  | — |  |  |  | 45 |  |  |  | 50 |  |  |  | — |  |  |  | 50 |
Total revenue from contracts with customers |  | $ | 1,060 |  |  | $ | 49 |  |  | $ | 1,109 |  |  | $ | 965 |  |  | $ | 47 |  |  | $ | 1,012 |  |  | $ | 951 |  |  | $ | 46 |  |  | $ | 997 |
The following table disaggregates revenue from contracts with customers associated with the Company's natural gas operations for the years ended December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |  |  | 2022 |
|  | Avista Utilities |  |  | Avista Utilities |  |  | Avista Utilities |
NATURAL GAS OPERATIONS |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  |  |  |  |  |  |  |  |
Residential |  | $ | 317 |  |  | $ | 326 |  |  | $ | 284 |
Commercial |  |  | 163 |  |  |  | 164 |  |  |  | 140 |
Industrial and interruptible |  |  | 13 |  |  |  | 17 |  |  |  | 10 |
Total retail revenue |  |  | 493 |  |  |  | 507 |  |  |  | 434 |
Transportation |  |  | 11 |  |  |  | 8 |  |  |  | 9 |
Other revenue from contracts with customers |  |  | 6 |  |  |  | 6 |  |  |  | 6 |
Total revenue from contracts with customers |  | $ | 510 |  |  | $ | 521 |  |  | $ | 449 |

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