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Cash flows (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Supplemental disclosures of cash flow information |  |
Interest paid to non-affiliates, net of amounts capitalized | $ 62 | $ 21
Income taxes paid (including refundable credits) | 18 | 0
Supplemental disclosures of noncash activities |  |
Estimated fair value of noncash contributions in aid of construction (investing) | 6 | 1
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) | 30 | 50
Right-of-use assets obtained in exchange for finance lease obligations (financing) | 13 | 40
Right-of-use assets obtained in exchange for operating lease obligations (investing) | 1 | 1
Common stock issued (gross) for director and executive/management compensation (financing) | 3 | 7
Obligations to fund low income housing investments (investing) | 0 | 7
Loans transferred from held for investment to held for sale (investing) | 20 | 0
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Supplemental disclosures of cash flow information |  |
Interest paid to non-affiliates, net of amounts capitalized | 14 | 6
Income taxes paid (including refundable credits) | 21 | 3
Supplemental disclosures of noncash activities |  |
Estimated fair value of noncash contributions in aid of construction (investing) | 6 | 1
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) | 29 | 48
Right-of-use assets obtained in exchange for finance lease obligations (financing) | 12 | 40
Common stock dividends payable (financing) | $ 13 | $ 0

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