XML 19 R39.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Electric utility subsidiary - Taxes (Details) (Hawaiian Electric Company, Inc. and Subsidiaries, USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Revenue taxes |  |  |  |
Revenue taxes included in Operating revenues | $ 74 | $ 69 | $ 203 | $ 198
Revenue taxes included as expense in Taxes, other than income taxes | $ 74 | $ 69 | $ 203 | $ 198

X
- Definition Discloses the amount included as operating expenses for the period related to revenues taxes, which is included in Taxes, other than income taxes. + References No definition available. + Details
Name: | he_OperatingExpensesRevenuesTaxes
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Discloses the amount included in operating revenues for the period related to revenues taxes. + References No definition available. + Details
Name: | he_OperatingRevenuesTaxes
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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