XML 69 R42.htm IDEA: XBRL DOCUMENT v3.24.0.1

Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Income Tax Expense Related to Investment

The table below summarizes the amounts in income tax expense related to ASB’s LIHTC investments:

Years ended December 31			2023						2022						2021
(in millions)
Amounts in income taxes related to low-income housing tax credit investments
Amortization recognized in the provision for income taxes			$	(13.5)					$	(12.0)					$	(10.3)
Tax credits and other tax benefits recognized in the provision for income taxes			18.3						16.3						13.9
Net benefit to income tax expense			$	4.8					$	4.3					$	3.6

X

- Definition

Summary Of Amounts In Income Tax Expense, Affordable Housing Projects [Table Text Block]

+ References

No definition available.

+ Details

Name:	he_SummaryOfAmountsInIncomeTaxExpenseAffordableHousingProjectsTableTextBlock
Namespace Prefix:	he_
Data Type:	dtr-types1:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration