Organization	3 Months Ended
Mar. 31, 2015
Organization [Abstract]
Organization	1. ORGANIZATION IPALCO is a holding company incorporated under the laws of the state of Indiana. IPALCO, acquired by AES in March 2001, is owned by AES U.S. Investments and CDPQ. As of March 31, 2015, AES U.S. Investments is owned by AES U.S. Holdings, LLC (85%) and CDPQ (15%). Please see Note 10, “Subsequent Events” for additional details. IPALCO owns all of the outstanding common stock of IPL. Substantially all of IPALCO’s business consists of the generation, transmission, distribution and sale of electric energy conducted through its principal subsidiary, IPL. IPL was incorporated under the laws of the state of Indiana in 1926. IPL has approximately 480,000 retail customers in the city of Indianapolis and neighboring cities, towns and communities, and adjacent rural areas all within the state of Indiana, with the most distant point being approximately forty miles from Indianapolis. IPL has an exclusive right to provide electric service to those customers. IPL owns and operates two primarily coal-fired generating plants, one combination coal and gas-fired plant and two combustion turbines at a separate site that are all used for generating electricity. IPL’s net electric generation capacity for winter is 3,233 MW and net summer capacity is 3,115 MW.

1. ORGANIZATION

IPALCO is a holding company incorporated under the laws of the state of Indiana. IPALCO, acquired by AES in March 2001, is owned by AES U.S. Investments and CDPQ. As of March 31, 2015, AES U.S. Investments is owned by AES U.S. Holdings, LLC (85%) and CDPQ (15%). Please see Note 10, “Subsequent Events” for additional details. IPALCO owns all of the outstanding common stock of IPL. Substantially all of IPALCO’s business consists of the generation, transmission, distribution and sale of electric energy conducted through its principal subsidiary, IPL. IPL was incorporated under the laws of the state of Indiana in 1926. IPL has approximately 480,000 retail customers in the city of Indianapolis and neighboring cities, towns and communities, and adjacent rural areas all within the state of Indiana, with the most distant point being approximately forty miles from Indianapolis. IPL has an exclusive right to provide electric service to those customers. IPL owns and operates two primarily coal-fired generating plants, one combination coal and gas-fired plant and two combustion turbines at a separate site that are all used for generating electricity. IPL’s net electric generation capacity for winter is 3,233 MW and net summer capacity is 3,115 MW.