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v3.19.1

Retirement benefits (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Defined benefit plans |  |  |
Expected payments for remainder of fiscal year | $ 2,600,000 |  | $ 1,500,000
Retirement benefits expense | $ 15,000,000 | $ 12,000,000 |
Number of years for which regulatory asset/liability for each utility will be amortized, beginning with respective utility's next rate case (in years) | 5 years |  |
Defined contribution plan, expenses recognized | $ 1,900,000 | 1,600,000 |
Cash contributions by the employer to defined contribution plan | 3,700,000 | 3,700,000 |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Expected payments for remainder of fiscal year | 1,200,000 |  | 600,000
Retirement benefits expense | 14,000,000 | 11,000,000 |
Defined contribution plan, expenses recognized | 700,000 | 500,000 |
Cash contributions by the employer to defined contribution plan | 700,000 | 500,000 |
Pension benefits |  |  |
Defined benefit plans |  |  |
Contributions made to defined benefit plans | 8,000,000 | 16,000,000 |
Contributions expected to be paid in current year | 47,500,000 |  | 38,500,000
Service cost | 15,382,000 | 17,113,000 |
Interest cost | 21,033,000 | 19,234,000 |
Expected return on plan assets | (27,998,000) | (27,254,000) |
Amortization of net prior service gain | (11,000) | (10,000) |
Amortization of net actuarial (gains) losses | 3,839,000 | 7,395,000 |
Net periodic pension/benefit cost (return) | 12,245,000 | 16,478,000 |
Impact of PUC D&Os | 12,279,000 | 2,657,000 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | 24,524,000 | 19,135,000 |
Pension benefits | American Savings Bank (ASB) |  |  |
Defined benefit plans |  |  |
Contributions expected to be paid in current year | 0 |  | 0
Pension benefits | Hawaiian Electric Industries, Inc. |  |  |
Defined benefit plans |  |  |
Contributions expected to be paid in current year | 700,000 |  | 900,000
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Contributions made to defined benefit plans | 8,000,000 | 15,000,000 |
Contributions expected to be paid in current year | 46,800,000 |  | $ 37,600,000
Service cost | 15,001,000 | 16,673,000 |
Interest cost | 19,414,000 | 17,710,000 |
Expected return on plan assets | (26,164,000) | (25,607,000) |
Amortization of net prior service gain | 2,000 | 2,000 |
Amortization of net actuarial (gains) losses | 3,576,000 | 6,710,000 |
Net periodic pension/benefit cost (return) | 11,829,000 | 15,488,000 |
Impact of PUC D&Os | 12,279,000 | 2,657,000 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | 24,108,000 | 18,145,000 |
Other benefits |  |  |
Defined benefit plans |  |  |
Service cost | 541,000 | 669,000 |
Interest cost | 1,997,000 | 1,931,000 |
Expected return on plan assets | (3,086,000) | (3,192,000) |
Amortization of net prior service gain | (452,000) | (452,000) |
Amortization of net actuarial (gains) losses | (3,000) | (2,000) |
Net periodic pension/benefit cost (return) | (1,003,000) | (1,046,000) |
Impact of PUC D&Os | 811,000 | 1,071,000 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | (192,000) | 25,000 |
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Service cost | 537,000 | 664,000 |
Interest cost | 1,917,000 | 1,859,000 |
Expected return on plan assets | (3,035,000) | (3,140,000) |
Amortization of net prior service gain | (451,000) | (451,000) |
Amortization of net actuarial (gains) losses | 0 | 0 |
Net periodic pension/benefit cost (return) | (1,032,000) | (1,068,000) |
Impact of PUC D&Os | 811,000 | 1,071,000 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | $ (221,000) | $ 3,000 |

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