XML 18 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
	Mar. 31, 2014	Mar. 31, 2013
Hawaiian Electric Company, Inc. and Subsidiaries
Revenue taxes
Revenue taxes included in Operating revenues	$ 65	$ 64
Revenue taxes included as expense in Taxes, other than income taxes	$ 65	$ 64

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