Credit agreements and changes in debt (Tables)

9 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Note Purchase Agreements

On May 14, 2020, the Utilities issued, through a private placement pursuant to separate note purchase agreements (NPAs), the following unsecured senior notes bearing taxable interest (May Notes):

	Series 2020A	Series 2020B	Series 2020C
Aggregate principal amount	$80 million	$60 million	$20 million
Fixed coupon interest rate
Hawaiian Electric	3.31%	3.31%	3.96%
Hawaii Electric Light	3.96%
Maui Electric	3.31%	3.96%
Maturity date
Hawaiian Electric	5/1/2030	5/1/2030	5/1/2050
Hawaii Electric Light	5/1/2050
Maui Electric	5/1/2030	5/1/2050
Principal amount by company:
Hawaiian Electric	$50 million (Green Bond)	$40 million	$20 million
Hawaii Electric Light	$10 million	—	—
Maui Electric	$20 million	$20 million	—

	Series 2020B	Series 2020C	Series 2020D	Series 2020E
Aggregate principal amount	$15 million	$40 million	$30 million	$30 million
Fixed coupon interest rate
Hawaiian Electric			3.28%	3.51%
Hawaii Electric Light	3.28%	3.51%
Maui Electric		3.51%
Maturity date (from funding)
Hawaiian Electric			20 years	30 years
Hawaii Electric Light	20 years	30 years
Maui Electric		30 years
Principal amount by company:
Hawaiian Electric	—	—	$30 million	$30 million
Hawaii Electric Light	$15 million	$15 million	—	—
Maui Electric	—	$25 million	—	—