Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes The effective tax rate reported for the three and six months ended June 30, 2015 was 36% compared to 37% for the same periods in 2014. CenterPoint Houston reported no uncertain tax liability as of June 30, 2015 and expects no significant change to the uncertain tax liability over the twelve-month period ending June 30, 2016. Tax years through 2011 have been audited and settled with the Internal Revenue Service (IRS). CenterPoint Energy’s consolidated federal income tax returns for the years 2012 and 2013 are currently under audit by the IRS. For 2014 and 2015, CenterPoint Energy is a participant in the IRS’s Compliance Assurance Process.

Income Taxes

6 Months Ended

Jun. 30, 2015

Income Taxes

The effective tax rate reported for the three and six months ended June 30, 2015 was 36% compared to 37% for the same periods in 2014.

CenterPoint Houston reported no uncertain tax liability as of June 30, 2015 and expects no significant change to the uncertain tax liability over the twelve-month period ending June 30, 2016. Tax years through 2011 have been audited and settled with the Internal Revenue Service (IRS). CenterPoint Energy’s consolidated federal income tax returns for the years 2012 and 2013 are currently under audit by the IRS. For 2014 and 2015, CenterPoint Energy is a participant in the IRS’s Compliance Assurance Process.