Energy Purchase Contracts (Tables)

12 Months Ended

Dec. 31, 2024

Energy Purchase Contracts [Line Items]

Schedule of Utility Total Expenses

Total expenses for power purchased, natural gas purchased, fuel for generation and other fuel costs, which are included in utility resource costs in the Consolidated Statements of Income, were as follows for the years ended December 31 (dollars in millions):

	2024		2023		2022
Utility power resources	$	548	$	607	$	661

Future Contractual Commitments for Power Resources and Natural Gas Resources

The following table details Avista Utilities’ future contractual commitments for power resources (including transmission contracts) and natural gas resources (including transportation contracts) (dollars in millions):

	2025		2026		2027		2028		2029		Thereafter		Total
Power resources	$	333	$	311	$	285	$	263	$	264	$	2,570	$	4,026
Natural gas resources		108		81		64		55		50		249		607
Total	$	441	$	392	$	349	$	318	$	314	$	2,819	$	4,633

Contractual Obligations [Member]

Energy Purchase Contracts [Line Items]

Future Contractual Commitments for Power Resources and Natural Gas Resources

The following table details future contractual commitments under these agreements (dollars in millions):

	2025		2026		2027		2028		2029		Thereafter		Total
Contractual obligations	$	39	$	40	$	18	$	18	$	9	$	165	$	289