XML 83 R69.htm IDEA: XBRL DOCUMENT v3.21.2
Retirement benefits (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Defined Benefit Plan          
Contributions made to defined benefit plans     $ 39,000 $ 53,000  
Contributions expected to be paid in current year $ 52,000   52,000   $ 71,000
Expected payments for remainder of fiscal year 2,000   2,000   2,000
Retirement benefits expense     $ 35,000 46,000  
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     $ 4,900 5,500  
Cash contributions by the employer to defined contribution plan     4,800 6,000  
Pension benefits          
Defined Benefit Plan          
Service cost 20,102 $ 18,341 61,031 55,066  
Interest cost 18,896 20,660 56,497 60,987  
Expected return on plan assets (33,022) (28,422) (99,157) (85,353)  
Amortization of net prior period (gain)/cost 0 2 0 7  
Amortization of net actuarial (gain) losses 10,112 8,944 20,099 25,059  
Net periodic pension/benefit cost (return) 16,088 19,525 38,470 55,766  
Impact of PUC D&Os 4,292 4,976 20,972 17,499  
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) 20,380 24,501 59,442 73,265  
Other benefits          
Defined Benefit Plan          
Service cost 711 641 2,121 1,903  
Interest cost 1,459 1,842 4,597 5,553  
Expected return on plan assets (3,252) (3,023) (9,717) (9,100)  
Amortization of net prior period (gain)/cost (383) (474) (1,150) (1,355)  
Amortization of net actuarial (gain) losses (140) 53 158 154  
Net periodic pension/benefit cost (return) (1,605) (961) (3,991) (2,845)  
Impact of PUC D&Os 1,483 835 3,629 2,389  
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) (122) (126) (362) (456)  
American Savings Bank (ASB)          
Defined Benefit Plan          
Contributions expected to be paid in current year 0   0   0
Hawaiian Electric Industries, Inc.          
Defined Benefit Plan          
Contributions expected to be paid in current year 1,000   1,000   1,000
Hawaiian Electric Company, Inc. and Subsidiaries          
Defined Benefit Plan          
Contributions made to defined benefit plans     38,000 52,000  
Contributions expected to be paid in current year 51,000   51,000   70,000
Expected payments for remainder of fiscal year 1,000   1,000   $ 1,000
Retirement benefits expense     35,000 43,000  
Defined contribution plan, expenses recognized     2,300 2,100  
Cash contributions by the employer to defined contribution plan     2,300 2,100  
Hawaiian Electric Company, Inc. and Subsidiaries | Pension benefits          
Defined Benefit Plan          
Service cost 19,610 17,921 59,597 53,703  
Interest cost 17,614 19,183 52,676 56,613  
Expected return on plan assets (31,318) (26,815) (94,053) (80,527)  
Amortization of net prior period (gain)/cost 0 1 0 6  
Amortization of net actuarial (gain) losses 9,880 8,188 20,651 22,925  
Net periodic pension/benefit cost (return) 15,786 18,478 38,871 52,720  
Impact of PUC D&Os 4,292 4,976 20,972 17,499  
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) 20,078 23,454 59,843 70,219  
Hawaiian Electric Company, Inc. and Subsidiaries | Other benefits          
Defined Benefit Plan          
Service cost 704 635 2,101 1,886  
Interest cost 1,398 1,764 4,406 5,327  
Expected return on plan assets (3,202) (2,986) (9,566) (8,966)  
Amortization of net prior period (gain)/cost (383) (474) (1,148) (1,353)  
Amortization of net actuarial (gain) losses (138) 53 155 155  
Net periodic pension/benefit cost (return) (1,621) (1,008) (4,052) (2,951)  
Impact of PUC D&Os 1,483 835 3,629 2,389  
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ (138) $ (173) $ (423) $ (562)