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Shareholders' equity | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Shareholders' equity |
Note 7 · Shareholders’ equity
Reserved shares. As of December 31, 2021, HEI had reserved a total of 16.4 million shares of common stock for future issuance under the HEI Dividend Reinvestment and Stock Purchase Plan (DRIP), the Hawaiian Electric Industries Retirement Savings Plan (HEIRSP), the ASB 401(k) Plan, the HEI 2011 Nonemployee Director Stock Plan, and the 2010 Equity and Incentive Plan, as amended. Accumulated other comprehensive income/(loss). Changes in the balances of each component of AOCI were as follows:
| HEI Consolidated |  | Hawaiian Electric Consolidated
(in thousands) | Net unrealized gains (losses) on securities |  | Unrealized gains (losses) on derivatives |  | Retirement benefit plans |  | AOCI |  | AOCI-Retirement benefit plans
Balance, December 31, 2018 | $ | (24,423) |  |  | $ | (436) |  |  | $ | (25,751) |  |  | $ | (50,610) |  |  | $ | 99 |
Current period other comprehensive income (loss) and reclassifications, net of taxes | 26,904 |  |  | (1,177) |  |  | 4,844 |  |  | 30,571 |  |  | (1,378) |
Balance, December 31, 2019 | 2,481 |  |  | (1,613) |  |  | (20,907) |  |  | (20,039) |  |  | (1,279) |
Current period other comprehensive income (loss) and reclassifications, net of taxes | 17,505 |  |  | (1,750) |  |  | 3,020 |  |  | 18,775 |  |  | (1,640) |
Balance, December 31, 2020 | 19,986 |  |  | (3,363) |  |  | (17,887) |  |  | (1,264) |  |  | (2,919) |
Current period other comprehensive income (loss) and reclassifications, net of taxes | (52,023) |  |  | (275) |  |  | 1,029 |  |  | (51,269) |  |  | (361) |
Balance, December 31, 2021 | $ | (32,037) |  |  | $ | (3,638) |  |  | $ | (16,858) |  |  | $ | (52,533) |  |  | $ | (3,280) |
Reclassifications out of AOCI were as follows:
|  | Amount reclassified from AOCI |  | Affected line item in the Statement of Income/Balance Sheet
Years ended December 31 |  | 2021 |  | 2020 |  | 2019 |
(in thousands) |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |
Net realized gains on securities included in net income |  | $ | (387) |  |  | $ | (1,638) |  |  | $ | (478) |  |  | Gain on sale of investment securities, net
Net realized losses on derivatives qualifying as cash flow hedges |  | 37 |  |  | — |  |  | — |  |  | Interest expense
Retirement benefit plans: |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 19,253 |  |  | 23,689 |  |  | 10,107 |  |  | See Note 10 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | (171,345) |  |  | 39,860 |  |  | (16,177) |  |  | See Note 10 for additional details
Total reclassifications |  | $ | (152,442) |  |  | $ | 61,911 |  |  | $ | (6,548) |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |
Retirement benefit plans: |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | $ | 19,461 |  |  | $ | 21,550 |  |  | $ | 9,550 |  |  | See Note 10 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | (171,345) |  |  | 39,860 |  |  | (16,177) |  |  | See Note 10 for additional details
Total reclassifications |  | $ | (151,884) |  |  | $ | 61,410 |  |  | $ | (6,627) |  |  |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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