Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	$ (307,000,000)	$ (195,000,000)
Interest and Investment Income	1,000,000	3,000,000
Net Income (Loss)	561,000,000	364,000,000
Appalachian Power Co [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	(66,248,000)	(47,012,000)
Net Income (Loss)	101,851,000	70,548,000
Indiana Michigan Power Co [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	(38,315,000)	(21,263,000)
Net Income (Loss)	87,089,000	43,457,000
Ohio Power Co [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	(34,052,000)	(69,796,000)
Net Income (Loss)	60,774,000	129,774,000
Public Service Co Of Oklahoma [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	(4,989,000)	(8,634,000)
Net Income (Loss)	8,448,000	13,693,000
Southwestern Electric Power Co [Member]
Income Taxes (Textuals) [Abstract]
Income Tax Benefit	(12,165,000)	(6,796,000)
Net Income (Loss)	$ 22,962,000	$ 11,548,000