Revenue (Tables)

6 Months Ended

Jun. 30, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Utilities Operating Revenue Expense Taxes

Utility-related taxes included in revenue from contracts with customers were as follows for the three and six months ended June 30 (dollars in millions):

	Three months ended June 30,				Six months ended June 30,
	2025		2024		2025		2024
Utility-related taxes	$	18	$	17	$	45	$	44

Disaggregation of Revenue

Disaggregation of Total Operating Revenue

The following table disaggregates total operating revenue by segment and source for the three and six months ended June 30 (dollars in millions):

	Three months ended June 30,					Six months ended June 30,
	2025			2024		2025			2024
Avista Utilities
Revenue from contracts with customers	$	330		$	319	$	856		$	819
Derivative revenues		52			49		113			138
Alternative revenue programs		12			16		4			19
Deferrals and amortizations for rate refunds to customers		(2	)		—		(2	)		—
Other utility revenues		8			7		33			10
Total Avista Utilities		400			391		1,004			986
AEL&P
Revenue from contracts with customers		11			11		24			25
Total operating revenues	$	411		$	402	$	1,028		$	1,011

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 three and six months ended June 30 (dollars in millions):

	2025						2024
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
Three months ended June 30:
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	111	$	5	$	116	$	93	$	5	$	98
Commercial		94		6		100		85		6		91
Industrial		35		—		35		30		—		30
Public street and highway lighting		3		—		3		2		—		2
Total retail revenue		243		11		254		210		11		221
Transmission		7		—		7		10		—		10
Other revenue from contracts with    customers		6		—		6		8		—		8
Total electric revenue from contracts  with customers	$	256	$	11	$	267	$	228	$	11	$	239
Six months ended June 30:
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	276	$	12	$	288	$	235	$	12	$	247
Commercial		197		12		209		178		13		191
Industrial		70		—		70		58		—		58
Public street and highway lighting		5		—		5		5		—		5
Total retail revenue		548		24		572		476		25		501
Transmission		16		—		16		19		—		19
Other revenue from contracts with    customers		14		—		14		24		—		24
Total electric revenue from contracts    with customers	$	578	$	24	$	602	$	519	$	25	$	544

The following table disaggregates revenue from contracts with customers associated with the Company's natural gas operations for the three and six months ended June 30 (dollars in millions):

	Three months ended June 30,				Six months ended June 30,
	2025		2024		2025		2024
	Avista Utilities		Avista Utilities		Avista Utilities		Avista Utilities
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	45	$	55	$	174	$	188
Commercial		22		29		87		97
Industrial and interruptible		3		3		7		7
Total retail revenue		70		87		268		292
Transportation		1		3		6		5
Other revenue from contracts with customers		3		1		4		3
Total natural gas revenue from contracts with customers	$	74	$	91	$	278	$	300