Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES IPALCO’s effective combined state and federal income tax rates were 36.3% and 36.0% for the three and nine months ended September 30, 2015, respectively, as compared to 36.4% and 34.6% for the three and nine months ended September 30, 2014, respectively. The increase in the effective tax rates versus the comparable nine-month period was primarily the result of an increase in state income tax expense (net of the federal tax benefit) and the disallowance of the domestic manufacturing deduction (Internal Revenue Code Section 199). The state tax expense in the current period is greater than the prior period due to the prior period containing an adjustment for a reduction in the enacted Indiana state tax rate. Due to the election of the final tangible property regulations in the prior year, IPALCO will not receive the benefit of the manufacturers’ deduction until the Net Operating Loss carryover caused by the election is used in its entirety. These increases in the rate were partially offset by the increase in the allowance for equity funds used during construction in 2015.

Income Taxes

9 Months Ended

Sep. 30, 2015

INCOME TAXES

IPALCO’s effective combined state and federal income tax rates were 36.3% and 36.0% for the three and nine months ended September 30, 2015, respectively, as compared to 36.4% and 34.6% for the three and nine months ended September 30, 2014, respectively. The increase in the effective tax rates versus the comparable nine-month period was primarily the result of an increase in state income tax expense (net of the federal tax benefit) and the disallowance of the domestic manufacturing deduction (Internal Revenue Code Section 199). The state tax expense in the current period is greater than the prior period due to the prior period containing an adjustment for a reduction in the enacted Indiana state tax rate. Due to the election of the final tangible property regulations in the prior year, IPALCO will not receive the benefit of the manufacturers’ deduction until the Net Operating Loss carryover caused by the election is used in its entirety. These increases in the rate were partially offset by the increase in the allowance for equity funds used during construction in 2015.