XML 23 R48.htm IDEA: XBRL DOCUMENT v2.4.0.6

Commitments and contingencies - (Tables) - HECO (Hawaiian Electric Company, Inc. and Subsidiaries)

9 Months Ended

Sep. 30, 2012

Hawaiian Electric Company, Inc. and Subsidiaries

Regulatory projects and legal obligations

Schedule of changes in asset retirement obligation

(in thousands)		2012			2011
Balance, January 1		$	50,871		$	48,630
Accretion expense		1,233			1,641
Liabilities incurred		—			—
Liabilities settled		(2,788		)	(681		)
Revisions in estimated cash flows		—			390
Balance, September 30		$	49,316		$	49,980

X

- Details

Name:	he_RegulatoryProjectsAndLegalObligationsLineItems
Namespace Prefix:	he_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859

+ Details

Name:	us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration