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Other related-party transactions | 12 Months Ended
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Dec. 31, 2017
Related Party Transactions [Abstract] |
Other related-party transactions |
15 · Other related-party transactions
Mr. Timothy Johns, a member of the Hawaiian Electric Board of Directors, was an executive officer of Hawaii Medical Service Association (HMSA) in 2011 through June 29, 2017. Ms. Susan Li, an executive of Hawaiian Electric, is the Chair of the Hawaii Dental Service (HDS) Board of Directors. The Company’s HMSA costs and expense (for health insurance premiums, claims plus administration expense and stop-loss insurance coverages) and HDS costs and expense (for dental insurance premiums) and the Utilities’ HMSA costs and expense (for health insurance premiums) and HDS costs and expense (for dental insurance premiums) were as follows:
| HEI consolidated |  | Hawaiian Electric consolidated
(in millions) | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015
HMSA costs | $ | 28 |  |  | $ | 28 |  |  | $ | 30 |  |  | $ | 23 |  |  | $ | 22 |  |  | $ | 23 |
HMSA expense* | 19 |  |  | 20 |  |  | 21 |  |  | 14 |  |  | 14 |  |  | 14 |
HDS costs | 3 |  |  | 3 |  |  | 3 |  |  | 2 |  |  | 2 |  |  | 2 |
HDS expense* | 2 |  |  | 2 |  |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |
* Charged the remaining costs primarily to electric utility plant. The costs and expense in the table above are gross amounts (i.e., not net of employee contributions to employee benefits).

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- Definition The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864 + Details
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