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Electric utility segment - Condensed consolidating statement of comprehensive income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | $ 69,167 | $ 64,358
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 4,501 | 6,010
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (4,325) | (5,811)
Other comprehensive loss, net of tax benefits | (117,159) | (44,016)
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | (47,992) | 20,342
Hawaiian Electric Consolidated |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | 46,409 | 43,358
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 4,376 | 5,845
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (4,325) | (5,811)
Other comprehensive loss, net of tax benefits | 51 | 34
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | 46,460 | 43,392
Hawaiian Electric Consolidated | Reportable Legal Entities | Hawaiian Electric Industries, Inc. |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | 46,409 | 43,358
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 4,376 | 5,845
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (4,325) | (5,811)
Other comprehensive loss, net of tax benefits | 51 | 34
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | 46,460 | 43,392
Hawaiian Electric Consolidated | Reportable Legal Entities | Hawaii Electric Light |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | 7,377 | 6,692
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 670 | 835
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (670) | (834)
Other comprehensive loss, net of tax benefits | 0 | 1
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | 7,377 | 6,693
Hawaiian Electric Consolidated | Reportable Legal Entities | Maui Electric |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | 6,284 | 5,818
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 603 | 761
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | (603) | (761)
Other comprehensive loss, net of tax benefits | 0 | 0
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | 6,284 | 5,818
Hawaiian Electric Consolidated | Reportable Legal Entities | Other subsidiaries |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | 0 | 0
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | 0 | 0
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | 0 | 0
Other comprehensive loss, net of tax benefits | 0 | 0
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | 0 | 0
Hawaiian Electric Consolidated | Consolidating adjustments |  |
Condensed Statement of Income Captions [Line Items] |  |
Net income for common stock | (13,661) | (12,510)
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of taxes | (1,273) | (1,596)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes | 1,273 | 1,595
Other comprehensive loss, net of tax benefits | 0 | (1)
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc. | $ (13,661) | $ (12,511)

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