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Cash flows (Tables) | 9 Months Ended
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Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract] |
Schedule of supplemental disclosures of cash and noncash activity |
Nine months ended September 30 |  | 2015 |  | 2014
(in millions) |  |  |  |
Supplemental disclosures of cash flow information |  |  |  |  |  |
HEI consolidated |  |  |  |
Interest paid to non-affiliates |  | $ | 61 |  |  | $ | 64 |
Income taxes paid |  | 62 |  |  | 31 |
Income taxes refunded |  | 55 |  |  | 24 |
Hawaiian Electric consolidated |  |  |  |
Interest paid to non-affiliates |  | 43 |  |  | 44 |
Income taxes paid |  | 13 |  |  | 6 |
Income taxes refunded |  | 12 |  |  | 8 |
Supplemental disclosures of noncash activities |  |  |  |  |  |
HEI consolidated |  |  |  |
Real estate acquired in settlement of loans (investing) |  | — |  |  | 2 |
Real estate transferred from property, plant and equipment to other assets held-for-sale (investing) |  | 5 |  |  | — |
Obligations to fund low income housing investments (operating) |  | 1 |  |  | 6 |
HEI consolidated and Hawaiian Electric consolidated |  |  |  |
Additions to electric utility property, plant and equipment - unpaid invoices and accruals (investing), as revised for the nine months ended September 30, 2014 (1) |  | 1 |  |  | 15 |
(1) As revised for the nine months ended September 30, 2014 - See Note 1, “Basis of presentation - Revision of previously issued financial statements.”

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