0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Condensed Consolidated Statements of Income (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Condensed Consolidated Statements of Income (unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Balance Sheets (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Balance Sheets (unaudited)  (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - Condensed Consolidated Statements of Income (unaudited) - HECO link:presentationLink link:calculationLink link:definitionLink 9952160 - Statement - Condensed Consolidated Statements of Comprehensive Income (unaudited) - HECO link:presentationLink link:calculationLink link:definitionLink 9952161 - Statement - Condensed Consolidated Statements of Comprehensive Income (unaudited) - HECO (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952162 - Statement - Condensed Consolidated Balance Sheets (unaudited) - HECO link:presentationLink link:calculationLink link:definitionLink 9952163 - Statement - Condensed Consolidated Balance Sheets (unaudited) - HECO (parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952164 - Statement - Condensed Consolidated Statements of Changes in Common Stock Equity (unaudited) - HECO link:presentationLink link:calculationLink link:definitionLink 9952165 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) - HECO link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Basis of presentation link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Maui windstorm and wildfires link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Segment financial information link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Electric utility segment link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Credit agreements and long-term debt link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Shareholders' equity link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Retirement benefits link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Share-based compensation link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Cash flows link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Fair value measurements link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Basis of presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Maui windstorm and wildfires (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Segment financial information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Electric utility segment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Credit agreements and long-term debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Shareholders' equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Retirement benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Share-based compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Cash flows (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Fair value measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Maui windstorm and wildfires - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Maui windstorm and wildfires - Schedule of Utilities Charged (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Segment financial information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Segment financial information - Schedule of Segment Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Segment financial information - Schedule of Net Assets Classified as Held for Sale (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Electric utility segment - Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Electric utility segment - Unconsolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Electric utility segment - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Electric utility segment - Schedule of Purchases from IPPs (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Electric utility segment - Regulatory Proceedings (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Electric utility segment - Schedule of Annual Decoupling Filings Summary (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Electric utility segment - Regulatory Assets and Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Electric utility segment - Schedule of Condensed Consolidating Statements of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Electric utility segment - Schedule of Condensed Consolidating Statement of Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Electric utility segment - Schedule of Condensed Consolidating Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Electric utility segment - Schedule of Condensed Consolidating Statement of Changes in Common Stock Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Electric utility segment - Schedule of Condensed Consolidating Statement of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Credit agreements and long-term debt - Schedule of Line of Credit Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Credit agreements and long-term debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Credit agreements and long-term debt - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Shareholders' equity - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Shareholders' equity - Schedule of Reclassification out of AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Retirement benefits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Retirement benefits - Schedule of Components of Net Periodic Benefit Cost for Consolidated HEI (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Share-based compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Share-based compensation - Schedule of Share-Based Compensation Expense and Related Income Tax Benefit (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Share-based compensation - Schedule of Common Stock Granted to Nonemployee Directors (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Share-based compensation - Schedule of Changes in Share Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Share-based compensation - Schedule of Fair Value Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Cash flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Fair value measurements (Details) link:presentationLink link:calculationLink link:definitionLink