XML 191 R19.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Electric utility subsidiary | 6 Months Ended
--- | ---
Jun. 30, 2013
Electric utility subsidiary |
Electric utility subsidiary | 3 ·Electric utility subsidiary For consolidated HECO financial information, including its commitments and contingencies, see HECO’s consolidated financial statements beginning on page 30 through Note 10 on page 44.

X
- Details
Name: | he_ElectricUtilitySubsidiaryDisclosureAbstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element encapsulates disclosures pertaining to electric utility subsidiary. + References No definition available. + Details
Name: | he_ElectricUtilitySubsidiaryTextBlock
Namespace Prefix: | he_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration