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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The effective tax rate for the three months ended March 31, 2014 was 36% compared to 32% for the same period in 2013. The lower effective tax rate for the three months ended March 31, 2013 was primarily due to an income tax benefit recognized for a change in tax law in the first quarter of 2013. CenterPoint Houston reported no uncertain tax liability as of March 31, 2014 and expects no significant change to the uncertain tax liability over the next twelve months ending March 31, 2015. CenterPoint Energy’s consolidated federal income tax return filed for the year ended December 31, 2012 is currently under audit by the Internal Revenue Service.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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