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 Comprehensive Income (unaudited) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) 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 - Statement - Condensed Consolidated Statements of Income (unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Basis of presentation link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Maui windstorm and wildfires link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Segment financial information link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Electric utility segment link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Bank segment link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Credit agreements and changes in debt link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Shareholders' equity link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Retirement benefits link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Share-based compensation link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Income taxes link:presentationLink link:calculationLink link:definitionLink 9952178 - Disclosure - Cash flows link:presentationLink link:calculationLink link:definitionLink 9952179 - Disclosure - Fair value measurements link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Basis of presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Maui windstorm and wildfires (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - Segment financial information (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - Electric utility segment (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - Bank segment (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - Shareholders' equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - Retirement benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - Share-based compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - Cash flows (Tables) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - Fair value measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - Basis of presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - Maui windstorm and wildfires - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - Maui windstorm and wildfires - Utilities Charged (Details) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - Segment financial information - Segment Financial Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Segment financial information - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Electric utility segment - Consolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Electric utility segment - Unconsolidated Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Electric utility segment - Commitments and contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Electric utility segment - Purchases from IPPs (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Electric utility segment - Utility Projects (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Electric utility segment - Regulatory Proceedings (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Electric utility segment - Annual Decoupling Filings Summary (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Electric utility segment - Condensed Consolidating Statement of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Electric utility segment - Condensed Consolidating Statement of Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Electric utility segment - Condensed Consolidating Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Electric utility segment - Condensed Consolidating Statement of Changes in Common Stock Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Electric utility segment - Condensed Consolidating Statement of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - Bank segment - Income Statement Data (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - Bank segment - Reconciliation of Income (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - Bank segment - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - Bank segment - Balance Sheets Data (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - Bank segment - Components of Investment Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - Bank segment - Contractual Maturities of Investment Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - Bank segment - Loans Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - Bank segment - Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - Bank segment - Allowance for Loan Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - Bank segment - Credit Risk Profile - Payment Activity and Assigned Grades (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - Bank segment - Gross Charge-Offs by Portfolio Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - Bank segment - Credit Risk Profile - Payment Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - Bank segment - Credit Risk Profile - Nonaccrual Loans (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - Bank segment - Schedule of Loan Modification (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - Bank segment - Financial Effect of Loan Modification (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - Bank segment - Credit Risk Profile - Payment Activity for Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - Bank segment - Collateral - Dependent loans (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Bank segment - Mortgage Servicing Rights (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Bank segment - Mortgage Servicing Rights (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - Bank segment - Other Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - Bank segment - Derivative Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - Bank segment - Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - Credit agreements and changes in debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - Shareholders' equity - Accumulated Other Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - Shareholders' equity - Reclassification out of AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - Retirement benefits - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - Retirement benefits - Components of Net Periodic Benefit Cost for Consolidated HEI (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - Share-based compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - Share-based compensation - Share-Based Compensation Expense and Related Income Tax Benefit (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - Share-based compensation - Common Stock Granted to Nonemployee Directors (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - Share-based compensation - Changes in Share Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - Share-based compensation - Fair Value Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - Income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - Cash flows (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Fair value measurements - Carrying or Notional Amount, Fair Value and Placement in the Fair Value Hierarchy of the Company’s Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - Fair value measurements - Assets Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - Fair value measurements - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - Fair value measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink