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Leases - Amounts Related to Lease Cost and Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 80,254 | $ 74,520
Variable lease cost | 271,832 | 229,938
Sublease income | (2,515) |
Total lease cost | 349,571 | 304,458
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 73,375 | $ 71,584
Weighted-average remaining lease term—operating leases (in years) | 6 years 1 month 6 days | 4 years 4 months 24 days
Weighted-average discount rate—operating leases | 3.18% | 3.61%
Other leases |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 14,184 | $ 11,201
Variable lease cost | 14,360 | 12,765
Sublease income | (2,515) |
Total lease cost | 26,029 | 23,966
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 11,239 | $ 10,783
Weighted-average remaining lease term—operating leases (in years) | 9 years 1 month 6 days | 8 years 10 months 24 days
Weighted-average discount rate—operating leases | 2.84% | 2.87%
PPAs classified as leases |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 66,070 | $ 63,319
Variable lease cost | 257,472 | 217,173
Sublease income | 0 |
Total lease cost | 323,542 | 280,492
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 62,136 | $ 60,801
Weighted-average remaining lease term—operating leases (in years) | 2 years 6 months | 1 year 9 months 18 days
Weighted-average discount rate—operating leases | 3.63% | 4.08%
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 74,648 | $ 69,341
Variable lease cost | 269,058 | 227,015
Sublease income | (2,515) |
Total lease cost | 341,191 | 296,356
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 68,304 | $ 67,024
Weighted-average remaining lease term—operating leases (in years) | 5 years 10 months 24 days | 3 years 9 months 18 days
Weighted-average discount rate—operating leases | 3.31% | 3.84%
Hawaiian Electric Company, Inc. and Subsidiaries | Other leases |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 8,578 | $ 6,022
Variable lease cost | 11,586 | 9,842
Sublease income | (2,515) |
Total lease cost | 17,649 | 15,864
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 6,168 | $ 6,223
Weighted-average remaining lease term—operating leases (in years) | 10 years | 10 years 1 month 6 days
Weighted-average discount rate—operating leases | 2.98% | 3.20%
Hawaiian Electric Company, Inc. and Subsidiaries | PPAs classified as leases |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease cost | $ 66,070 | $ 63,319
Variable lease cost | 257,472 | 217,173
Sublease income | 0 |
Total lease cost | 323,542 | 280,492
Other information |  |
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases | $ 62,136 | $ 60,801
Weighted-average remaining lease term—operating leases (in years) | 2 years 6 months | 1 year 9 months 18 days
Weighted-average discount rate—operating leases | 3.63% | 4.08%

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- Definition Amount of lease cost recognized by lessee for lease contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Weighted average discount rate for operating lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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