Short-Term Borrowings (Tables)

3 Months Ended

Mar. 31, 2025

Avista Utilities [Member]

Line of Credit Facility [Line Items]

Schedule of Balances Outstanding and Interest Rates of Borrowings

Balances outstanding and interest rates on borrowings (excluding letters of credit) under Avista Corp.’s revolving committed line of credit were as follows as of March 31, 2025 and December 31, 2024 (dollars in millions):

	March 31,			December 31,
	2025			2024
Borrowings outstanding at end of period	$	274		$	342
Letters of credit outstanding at end of period	$	5		$	5
Average interest rate on borrowings at end of period		5.42	%		5.52	%

Alaska Electric Light & Power [Member]

Line of Credit Facility [Line Items]

Schedule of Balances Outstanding and Interest Rates of Borrowings

Balances outstanding and interest rates on borrowings under AEL&P’s revolving committed line of credit were as follows as of March 31, 2025 and December 31, 2024 (dollars in millions):

	March 31,			December 31,
	2025			2024
Borrowings outstanding at end of period	$	13		$	12
Average interest rate on borrowings at end of period		7.13	%		6.13	%