Condensed Consolidated Statements of Changes in Equity (USD $)	Total	Appalachian Power Co [Member]	Indiana Michigan Power Co [Member]	Ohio Power Co [Member]	Public Service Co Of Oklahoma [Member]	Southwestern Electric Power Co [Member]	Common Stock [Member]	Common Stock [Member] Appalachian Power Co [Member]	Common Stock [Member] Indiana Michigan Power Co [Member]	Common Stock [Member] Ohio Power Co [Member]	Common Stock [Member] Public Service Co Of Oklahoma [Member]	Common Stock [Member] Southwestern Electric Power Co [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Appalachian Power Co [Member]	Additional Paid-in Capital [Member] Indiana Michigan Power Co [Member]	Additional Paid-in Capital [Member] Ohio Power Co [Member]	Additional Paid-in Capital [Member] Public Service Co Of Oklahoma [Member]	Additional Paid-in Capital [Member] Southwestern Electric Power Co [Member]	Retained Earnings [Member]	Retained Earnings [Member] Appalachian Power Co [Member]	Retained Earnings [Member] Indiana Michigan Power Co [Member]	Retained Earnings [Member] Ohio Power Co [Member]	Retained Earnings [Member] Public Service Co Of Oklahoma [Member]	Retained Earnings [Member] Southwestern Electric Power Co [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] Appalachian Power Co [Member]	Accumulated Other Comprehensive Income [Member] Indiana Michigan Power Co [Member]	Accumulated Other Comprehensive Income [Member] Ohio Power Co [Member]	Accumulated Other Comprehensive Income [Member] Public Service Co Of Oklahoma [Member]	Accumulated Other Comprehensive Income [Member] Southwestern Electric Power Co [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Southwestern Electric Power Co [Member]
Beginning Balance at Dec. 31, 2012	$ 15,237,000,000	$ 3,052,562,000	$ 1,803,775,000	$ 4,525,709,000	$ 916,278,000	$ 2,021,473,000	$ 3,289,000,000	$ 260,458,000	$ 56,584,000	$ 321,201,000	$ 157,230,000	$ 135,660,000	$ 6,049,000,000	$ 1,573,752,000	$ 980,896,000	$ 1,744,099,000	$ 364,037,000	$ 674,606,000	$ 6,236,000,000	$ 1,248,250,000	$ 795,178,000	$ 2,626,134,000	$ 388,530,000	$ 1,228,806,000	$ (337,000,000)	$ (29,898,000)	$ (28,883,000)	$ (165,725,000)	$ 6,481,000	$ (17,860,000)	$ 0	$ 261,000
Beginning Balance, Shares at Dec. 31, 2012							506,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	41,000,000						7,000,000						34,000,000
Issuance of Common Stock, Shares							1,000,000
Common Stock Dividends		(90,000,000)	(25,000,000)	(175,000,000)	(27,500,000)	(62,500,000)														(90,000,000)	(25,000,000)	(175,000,000)	(27,500,000)	(62,500,000)
Common Stock Dividends	(469,000,000)																		(467,000,000)
Common Stock Dividends						(2,040,000)																									(2,000,000)	(2,040,000)
Other Changes in Equity	1,000,000												1,000,000
Net Income (Loss)																			701,000,000					39,629,000
Net Income (Loss) Attributable to Noncontrolling Interests	2,000,000					2,146,000																									2,000,000	2,146,000
Net Income (Loss)	703,000,000	100,410,000	84,211,000	150,830,000	42,125,000	41,775,000														100,410,000	84,211,000	150,830,000	42,125,000
Other Comprehensive Income (Loss)	24,000,000	2,063,000	3,795,000	7,060,000	(421,000)	959,000																			24,000,000	2,063,000	3,795,000	7,060,000	(421,000)	959,000
Ending Balance at Jun. 30, 2013	15,537,000,000	3,065,035,000	1,866,781,000	4,508,599,000	930,482,000	1,999,667,000	3,296,000,000	260,458,000	56,584,000	321,201,000	157,230,000	135,660,000	6,084,000,000	1,573,752,000	980,896,000	1,744,099,000	364,037,000	674,606,000	6,470,000,000	1,258,660,000	854,389,000	2,601,964,000	403,155,000	1,205,935,000	(313,000,000)	(27,835,000)	(25,088,000)	(158,665,000)	6,060,000	(16,901,000)	0	367,000
Ending Balance, Shares at Jun. 30, 2013							507,000,000
Beginning Balance at Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interests	1,000,000					1,056,000
Net Income (Loss)	339,000,000	29,862,000	40,754,000	21,056,000	28,432,000	30,227,000
Other Comprehensive Income (Loss)	(7,000,000)	447,000	496,000	2,725,000	(254,000)	426,000
Ending Balance at Jun. 30, 2013	15,537,000,000	3,065,035,000	1,866,781,000	4,508,599,000	930,482,000	1,999,667,000		260,458,000	56,584,000	321,201,000	157,230,000	135,660,000		1,573,752,000	980,896,000	1,744,099,000	364,037,000	674,606,000
Beginning Balance at Dec. 31, 2013	16,086,000,000	3,229,432,000	1,922,153,000	1,625,265,000	942,101,000	2,055,917,000	3,303,000,000	260,458,000	56,584,000	321,201,000	157,230,000	135,660,000	6,131,000,000	1,809,562,000	980,896,000	663,782,000	364,037,000	674,606,000	6,766,000,000	1,156,461,000	900,182,000	633,203,000	415,076,000	1,253,617,000	(115,000,000)	2,951,000	(15,509,000)	7,079,000	5,758,000	(8,444,000)	1,000,000	478,000
Beginning Balance, Shares at Dec. 31, 2013	508,113,964				10,482,000		508,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	29,000,000						5,000,000						24,000,000
Issuance of Common Stock, Shares							1,000,000
Common Stock Dividends		(40,000,000)	(75,000,000)	(35,000,000)		(50,000,000)														(40,000,000)	(75,000,000)	(35,000,000)		(50,000,000)
Common Stock Dividends	(490,000,000)																		(488,000,000)
Common Stock Dividends						(2,309,000)																									(2,000,000)	(2,309,000)
Other Changes in Equity	(3,000,000)																		(6,000,000)												3,000,000
Net Income (Loss)																			950,000,000					53,557,000
Net Income (Loss) Attributable to Noncontrolling Interests	2,000,000					2,228,000																									2,000,000	2,228,000
Net Income (Loss)	952,000,000	138,098,000	114,423,000	117,309,000	30,897,000	55,785,000														138,098,000	114,423,000	117,309,000	30,897,000
Other Comprehensive Income (Loss)	11,000,000	(254,000)	861,000	(791,000)	(436,000)	600,000																			11,000,000	(254,000)	861,000	(791,000)	(436,000)	600,000
Ending Balance at Jun. 30, 2014	16,585,000,000	3,327,276,000	1,962,437,000	1,706,783,000	972,562,000	2,059,993,000	3,308,000,000	260,458,000	56,584,000	321,201,000	157,230,000	135,660,000	6,155,000,000	1,809,562,000	980,896,000	663,782,000	364,037,000	674,606,000	7,222,000,000	1,254,559,000	939,605,000	715,512,000	445,973,000	1,257,174,000	(104,000,000)	2,697,000	(14,648,000)	6,288,000	5,322,000	(7,844,000)	4,000,000	397,000
Ending Balance, Shares at Jun. 30, 2014	508,902,340				10,482,000		509,000,000
Beginning Balance at Mar. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Noncontrolling Interests	1,000,000					1,126,000
Net Income (Loss)	391,000,000	36,247,000	27,334,000	56,535,000	22,449,000	32,823,000
Other Comprehensive Income (Loss)	5,000,000	(167,000)	393,000	(343,000)	(190,000)	332,000
Ending Balance at Jun. 30, 2014	$ 16,585,000,000	$ 3,327,276,000	$ 1,962,437,000	$ 1,706,783,000	$ 972,562,000	$ 2,059,993,000		$ 260,458,000	$ 56,584,000	$ 321,201,000	$ 157,230,000	$ 135,660,000		$ 1,809,562,000	$ 980,896,000	$ 663,782,000	$ 364,037,000	$ 674,606,000
Ending Balance, Shares at Jun. 30, 2014	508,902,340				10,482,000