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Revenue taxes (Details) - HECO (Hawaiian Electric Company, Inc. and Subsidiaries, USD $) In Millions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Revenue taxes |  |
Revenue taxes included in Operating revenues | $ 212 | $ 193
Revenue taxes included as expense in Taxes, other than income taxes | $ 212 | $ 193

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- 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
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- Definition Discloses the amount included in operating revenues for the period related to revenues taxes. + References No definition available. + Details
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- Details
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