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Cash flows (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Supplemental disclosures of cash flow information |  |
Interest paid to non-affiliates | $ 19 | $ 19
Income taxes paid (including refundable credits) | 3 | 4
Supplemental disclosures of noncash activities |  |
Estimated fair value of noncash contributions in aid of construction (investing) | 3 | 0
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) | 48 | 27
Loans transferred from held for investment to held for sale (investing) | 1 | 9
Common stock issued (gross) for director and executive/management compensation (financing) | 3 | 9
Transfer of retail repurchase agreements to deposit liabilities (financing) | 102 | 0
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Supplemental disclosures of cash flow information |  |
Interest paid to non-affiliates | 12 | 13
Income taxes paid (including refundable credits) | 5 | 2
Supplemental disclosures of noncash activities |  |
Estimated fair value of noncash contributions in aid of construction (investing) | 3 | 0
Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) | $ 29 | $ 26

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- Definition Noncash (or part noncash) increases in property, plant and equipment due to noncash contributions in aid of construction. + References No definition available. + Details
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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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