Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended				9 Months Ended				3 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended				9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012 Cash Flow Hedges [Member]	Sep. 30, 2012 Cash Flow Hedges [Member]	Sep. 30, 2013 Securities Available for Sale [Member]	Sep. 30, 2012 Securities Available for Sale [Member]	Sep. 30, 2013 Securities Available for Sale [Member]	Sep. 30, 2012 Securities Available for Sale [Member]	Sep. 30, 2013 Pension and OPEB [Member]	Sep. 30, 2013 Pension and OPEB [Member]	Sep. 30, 2013 Commodity [Member]	Dec. 31, 2012 Commodity [Member]	Sep. 30, 2013 Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Securities Available for Sale [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Securities Available for Sale [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Securities Available for Sale [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Securities Available for Sale [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Appalachian Power Co [Member]	Sep. 30, 2012 Appalachian Power Co [Member]	Sep. 30, 2013 Appalachian Power Co [Member]	Sep. 30, 2012 Appalachian Power Co [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Commodity [Member]	Dec. 31, 2012 Appalachian Power Co [Member] Commodity [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Commodity [Member]	Dec. 31, 2012 Indiana Michigan Power Co [Member] Commodity [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member]	Sep. 30, 2012 Ohio Power Co [Member]	Sep. 30, 2013 Ohio Power Co [Member]	Sep. 30, 2012 Ohio Power Co [Member]	Sep. 30, 2012 Ohio Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Ohio Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Ohio Power Co [Member] Commodity [Member]	Dec. 31, 2012 Ohio Power Co [Member] Commodity [Member]	Sep. 30, 2013 Ohio Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Ohio Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Commodity [Member]	Dec. 31, 2012 Public Service Co Of Oklahoma [Member] Commodity [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Pension and OPEB [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Commodity [Member]	Dec. 31, 2012 Southwestern Electric Power Co [Member] Commodity [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member]	Dec. 31, 2012 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Pension and OPEB [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Commodity [Member] Cash Flow Hedges [Member]		Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2013 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Reclassifications from Accumulated Other Comprehensive Income [Member] Interest Rate and Foreign Currency [Member] Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	$ (313,000,000)		$ (337,000,000)				$ 5,000,000		$ 4,000,000		$ (294,000,000)	$ (303,000,000)			$ 1,000,000		$ (8,000,000)				$ (25,000,000)		$ (30,000,000)																														$ (27,835,000)		$ (29,898,000)				$ (30,615,000)	$ (31,331,000)			$ 197,000		$ (644,000)				$ 2,583,000		$ 2,077,000																								$ (25,088,000)		$ (28,883,000)				$ (8,439,000)	$ (8,790,000)			$ 147,000		$ (446,000)				$ (16,796,000)		$ (19,647,000)																								$ (158,665,000)		$ (165,725,000)				$ (166,369,000)	$ (172,908,000)			$ 289,000		$ (912,000)				$ 7,415,000		$ 8,095,000																						$ 6,060,000		$ 6,481,000						$ (21,000)		$ 21,000				$ 6,081,000		$ 6,460,000																				$ (16,901,000)		$ (17,860,000)				$ (2,438,000)	$ (2,311,000)			$ (26,000)		$ 22,000				$ (14,437,000)		$ (15,571,000)
Distribution of Cook Coal Terminal to Parent																																																																																																																																									19,652,000		(2,651,000)				19,652,000	19,652,000			0		0				0		0
Change in Fair Value Recognized in AOCI	2,000,000		15,000,000				1,000,000		2,000,000		0	0			1,000,000		11,000,000				0		2,000,000																														(47,000)		684,000				0	0			(47,000)		684,000				0		0																								(49,000)		2,691,000				0	0			(49,000)		443,000				0		2,248,000																								(86,000)		907,000				0	0			(86,000)		907,000				0		0																						32,000		8,000						32,000		7,000				0		1,000																				40,000		13,000				0	0			40,000		13,000				0		0
Amounts Reclassified from AOCI	5,000,000		16,000,000				0		0		7,000,000	16,000,000			(3,000,000)		(4,000,000)				1,000,000		4,000,000		5,000,000	16,000,000	(2,000,000)			0			0		0		7,000,000	16,000,000															428,000		1,760,000				359,000	1,075,000			(184,000)		(74,000)				253,000		759,000		428,000	1,760,000	69,000			685,000			359,000	1,075,000													467,000		1,522,000				174,000	525,000			(117,000)		(16,000)				410,000		1,013,000		467,000	1,522,000	293,000			997,000			174,000	525,000													2,396,000		8,463,000				2,985,000	9,524,000			(250,000)		(42,000)				(339,000)		(1,019,000)		2,396,000	8,463,000	(589,000)			(1,061,000)			2,985,000	9,524,000											(204,000)		(601,000)						(14,000)		(31,000)				(190,000)		(570,000)		(204,000)	(601,000)																	485,000		1,471,000				(64,000)	(191,000)			(17,000)		(38,000)				566,000		1,700,000		485,000	1,471,000	549,000			1,662,000			(64,000)	(191,000)
Net Current Period Other Comprehensive Income	7,000,000	21,000,000	31,000,000	16,000,000			1,000,000		2,000,000		7,000,000	16,000,000			(2,000,000)		7,000,000				1,000,000		6,000,000																														381,000	2,618,000	2,444,000	4,444,000			359,000	1,075,000			(231,000)		610,000				253,000		759,000																								418,000	(126,000)	4,213,000	(4,546,000)			174,000	525,000			(166,000)		427,000				410,000		3,261,000																								2,310,000	5,016,000	9,370,000	9,926,000			2,985,000	9,524,000			(336,000)		865,000				(339,000)		(1,019,000)																						(172,000)		(593,000)	(465,000)					18,000		(24,000)				(190,000)		(569,000)																				525,000	864,000	1,484,000	(183,000)			(64,000)	(191,000)			23,000		(25,000)				566,000		1,700,000
Ending Balance in AOCI	(306,000,000)		(306,000,000)				6,000,000		6,000,000		(287,000,000)	(287,000,000)			(1,000,000)		(1,000,000)				(24,000,000)		(24,000,000)																														(27,454,000)		(27,454,000)				(30,256,000)	(30,256,000)			(34,000)		(34,000)				2,836,000		2,836,000																								(24,670,000)		(24,670,000)				(8,265,000)	(8,265,000)			(19,000)		(19,000)				(16,386,000)		(16,386,000)																								(136,703,000)		(136,703,000)				(143,732,000)	(143,732,000)			(47,000)		(47,000)				7,076,000		7,076,000																						5,888,000		5,888,000						(3,000)		(3,000)				5,891,000		5,891,000																				(16,376,000)		(16,376,000)				(2,502,000)	(2,502,000)			(3,000)		(3,000)				(13,871,000)		(13,871,000)
Commodity:
Utility Operations Revenues	3,797,000,000	3,814,000,000	10,539,000,000	10,412,000,000																								0			0								(1,000,000)		0		(1,000,000)		0			0			0		756,606,000	776,066,000	2,299,587,000	2,161,901,000																				(4,000)			(7,000)				(75,000)		(4,000)		(53,000)		(7,000)						537,453,000	499,078,000	1,518,357,000	1,371,070,000																				(10,000)			(19,000)				(173,000)		(10,000)		(89,000)		(19,000)						959,816,000	1,114,339,000	2,710,990,000	3,084,657,000																				(23,000)			(47,000)				(461,000)	(23,000)		(246,000)	(47,000)						408,803,000	364,851,000	986,008,000	968,683,000																		0			0			0			0						534,196,000	473,391,000	1,324,325,000	1,196,753,000																				0			0					0			0
Other Revenues	379,000,000	342,000,000	1,045,000,000	920,000,000																								(1,000,000)			(4,000,000)								(3,000,000)		(1,000,000)		(8,000,000)		(4,000,000)			0			0		2,569,000	3,192,000	6,833,000	7,950,000																																							514,000	768,000	3,552,000	4,453,000																																							2,827,000	5,391,000	12,982,000	14,638,000																																					621,000	1,156,000	2,865,000	2,654,000																																	441,000	680,000	1,163,000	1,403,000
Purchased Electricity for Resale	373,000,000	327,000,000	1,103,000,000	855,000,000																								0			13,000,000								(1,000,000)		0		3,000,000		13,000,000			0			0		47,391,000	45,196,000	172,334,000	155,421,000																				35,000			411,000				21,000		35,000		47,000		411,000						32,976,000	23,399,000	111,602,000	88,797,000																				88,000			1,074,000				47,000		88,000		115,000		1,074,000						34,568,000	46,146,000	114,911,000	156,384,000																				221,000			2,806,000				129,000	221,000		309,000	2,806,000						55,915,000	75,719,000	179,405,000	145,983,000																		0			0			0			0						37,505,000	35,109,000	120,273,000	97,150,000																				0			0					0			0
Other Operation Expense	677,000,000	775,000,000	2,079,000,000	2,150,000,000																																																	64,508,000	92,700,000	223,180,000	239,704,000																				(4,000)			(20,000)				(14,000)		(4,000)		(38,000)		(20,000)						136,702,000	141,728,000	414,418,000	411,218,000																				(1,000)			(11,000)				(8,000)		(1,000)		(23,000)		(11,000)						159,965,000	189,566,000	481,417,000	481,994,000																				(6,000)			(30,000)				(20,000)	(6,000)		(57,000)	(30,000)						60,566,000	58,975,000	162,032,000	154,834,000																		0			(11,000)		(10,000)	0		(25,000)	(11,000)						62,108,000	60,217,000	182,351,000	165,877,000																				1,000			(8,000)				(12,000)	1,000		(28,000)	(8,000)
Maintenance Expense	261,000,000	255,000,000	839,000,000	769,000,000																																																	49,924,000	47,047,000	207,870,000	131,212,000																				12,000			3,000				(11,000)		12,000		(29,000)		3,000						43,448,000	44,308,000	139,200,000	133,817,000																				4,000			0				(5,000)		4,000		(14,000)		0						71,670,000	73,024,000	218,962,000	227,643,000																				7,000			(3,000)				(11,000)	7,000		(26,000)	(3,000)						25,071,000	25,685,000	78,396,000	78,863,000																		5,000			3,000		(5,000)	5,000		(9,000)	3,000						24,654,000	27,816,000	84,725,000	78,835,000																				4,000			1,000				(7,000)	4,000		(14,000)	1,000
Property, Plant and Equipment																																							0				0																																	3,000			(9,000)				(15,000)		3,000		(34,000)		(9,000)																													1,000			(6,000)				(10,000)		1,000		(20,000)		(6,000)																													1,000			(15,000)				(21,000)	1,000		(44,000)	(15,000)																											5,000			1,000		(7,000)	5,000		(14,000)	1,000																													3,000			(3,000)				(8,000)	3,000		(16,000)	(3,000)
Regulatory Assets/(Liabilities), Net																												0	[1]		2,000,000	[1]							0	[1]	0	[1]	0	[1]	2,000,000	[1]		0	[1]		0	[1]																								114,000	[1]		1,515,000	[1]			(190,000)	[1]	114,000	[1]	(9,000)	[1]	1,515,000	[1]																												20,000	[1]		265,000	[1]			(31,000)	[1]	20,000	[1]	7,000	[1]	265,000	[1]																												0	[1]		0	[1]				0	[1]		0	[1]																										0	[1]		0	[1]		0	[1]		0	[1]																												0	[1]		0	[1]				0	[1]		0	[1]
Subtotal - Commodity																											(3,000,000)			0			0		0		11,000,000	25,000,000	(5,000,000)				(6,000,000)				2,000,000			6,000,000																									106,000			1,053,000			552,000	1,654,000	(284,000)				(116,000)				390,000		1,169,000																								451,000			1,534,000			268,000	808,000	(180,000)				(24,000)				631,000		1,558,000																								(906,000)			(1,632,000)			4,593,000	14,652,000	(384,000)			(64,000)			(522,000)		(1,568,000)																						(314,000)			(924,000)			(22,000)			(48,000)			(292,000)		(876,000)																								845,000			2,558,000			(98,000)	(294,000)	(27,000)			(58,000)			872,000		2,616,000
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense	447,000,000	470,000,000	1,310,000,000	1,353,000,000																																																	84,513,000	86,636,000	255,656,000	252,188,000																				0			0													0		0	45,393,000	37,734,000	131,991,000	109,273,000																				0			0													0		0	94,802,000	130,026,000	289,472,000	401,465,000																				1,000			3,000										2,000	1,000	5,000	3,000	24,191,000	24,433,000	72,449,000	71,356,000																		0			0									0		0	41,846,000	35,144,000	132,460,000	103,820,000																				0			0											0		0
Interest Expense	225,000,000	233,000,000	685,000,000	697,000,000																								1,000,000			3,000,000		0		0						0				0		2,000,000	1,000,000		6,000,000	3,000,000		47,375,000	50,071,000	143,707,000	153,323,000																				261,000			799,000												390,000	261,000	1,169,000	799,000	23,932,000	26,307,000	72,579,000	76,733,000																				149,000			447,000												631,000	149,000	1,558,000	447,000	45,070,000	53,576,000	142,487,000	160,984,000																				(341,000)			(1,023,000)										(524,000)	(341,000)	(1,573,000)	(1,023,000)	13,417,000	13,735,000	40,016,000	42,212,000																		(190,000)			(569,000)								(292,000)	(190,000)	(876,000)	(569,000)	32,614,000	21,498,000	100,151,000	65,210,000																				567,000			2,000,000										872,000	567,000	2,616,000	2,000,000
Subtotal - Interest Rate and Foreign Currency																											(3,000,000)			0			0		0		11,000,000	25,000,000	(5,000,000)				(6,000,000)				2,000,000			6,000,000																									106,000			1,053,000			552,000	1,654,000	(284,000)				(116,000)				390,000		1,169,000																								451,000			1,534,000			268,000	808,000	(180,000)				(24,000)				631,000		1,558,000																								(906,000)			(1,632,000)			4,593,000	14,652,000	(384,000)			(64,000)			(522,000)		(1,568,000)																						(314,000)			(924,000)			(22,000)			(48,000)			(292,000)		(876,000)																								845,000			2,558,000			(98,000)	(294,000)	(27,000)			(58,000)			872,000		2,616,000
Reclassifications from AOCI, before Income Tax (Expense) Credit																											(3,000,000)			0			0		0		11,000,000	25,000,000	(5,000,000)				(6,000,000)				2,000,000			6,000,000																									106,000			1,053,000			552,000	1,654,000	(284,000)				(116,000)				390,000		1,169,000																								451,000			1,534,000			268,000	808,000	(180,000)				(24,000)				631,000		1,558,000																								(906,000)			(1,632,000)			4,593,000	14,652,000	(384,000)			(64,000)			(522,000)		(1,568,000)																						(314,000)			(924,000)			(22,000)			(48,000)			(292,000)		(876,000)																								845,000			2,558,000			(98,000)	(294,000)	(27,000)			(58,000)			872,000		2,616,000
Income Tax (Expense) Credit	(257,000,000)	(241,000,000)	(520,000,000)	(620,000,000)																							(1,000,000)			0			0		0		4,000,000	9,000,000															(41,645,000)	(34,185,000)	(108,554,000)	(120,377,000)																			37,000			368,000			193,000	579,000													(27,953,000)	(16,974,000)	(69,102,000)	(45,755,000)																			158,000			537,000			94,000	283,000													(93,141,000)	(82,578,000)	(174,313,000)	(213,290,000)																			(317,000)			(571,000)			1,608,000	5,128,000											(32,217,000)	(35,355,000)	(58,778,000)	(64,872,000)																	(110,000)			(323,000)													(14,935,000)	(25,229,000)	(37,057,000)	(49,206,000)																			296,000			896,000			(34,000)	(103,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	5,000,000		16,000,000				0		0		7,000,000	16,000,000			(3,000,000)		(4,000,000)				1,000,000		4,000,000		5,000,000	16,000,000	(2,000,000)			0			0		0		7,000,000	16,000,000															428,000		1,760,000				359,000	1,075,000			(184,000)		(74,000)				253,000		759,000		428,000	1,760,000	69,000			685,000			359,000	1,075,000													467,000		1,522,000				174,000	525,000			(117,000)		(16,000)				410,000		1,013,000		467,000	1,522,000	293,000			997,000			174,000	525,000													2,396,000		8,463,000				2,985,000	9,524,000			(250,000)		(42,000)				(339,000)		(1,019,000)		2,396,000	8,463,000	(589,000)			(1,061,000)			2,985,000	9,524,000											(204,000)		(601,000)						(14,000)		(31,000)				(190,000)		(570,000)		(204,000)	(601,000)																	485,000		1,471,000				(64,000)	(191,000)			(17,000)		(38,000)				566,000		1,700,000		485,000	1,471,000	549,000			1,662,000			(64,000)	(191,000)
Gains and Losses on Available-for-Sale Securities
Interest Income	3,000,000	2,000,000	55,000,000	6,000,000																													0	0	0	0
Interest Expense	225,000,000	233,000,000	685,000,000	697,000,000																								1,000,000			3,000,000		0		0						0				0		2,000,000	1,000,000		6,000,000	3,000,000		47,375,000	50,071,000	143,707,000	153,323,000																				261,000			799,000												390,000	261,000	1,169,000	799,000	23,932,000	26,307,000	72,579,000	76,733,000																				149,000			447,000												631,000	149,000	1,558,000	447,000	45,070,000	53,576,000	142,487,000	160,984,000																				(341,000)			(1,023,000)										(524,000)	(341,000)	(1,573,000)	(1,023,000)	13,417,000	13,735,000	40,016,000	42,212,000																		(190,000)			(569,000)								(292,000)	(190,000)	(876,000)	(569,000)	32,614,000	21,498,000	100,151,000	65,210,000																				567,000			2,000,000										872,000	567,000	2,616,000	2,000,000
Reclassifications from AOCI, before Income Tax (Expense) Credit																											(3,000,000)			0			0		0		11,000,000	25,000,000	(5,000,000)				(6,000,000)				2,000,000			6,000,000																									106,000			1,053,000			552,000	1,654,000	(284,000)				(116,000)				390,000		1,169,000																								451,000			1,534,000			268,000	808,000	(180,000)				(24,000)				631,000		1,558,000																								(906,000)			(1,632,000)			4,593,000	14,652,000	(384,000)			(64,000)			(522,000)		(1,568,000)																						(314,000)			(924,000)			(22,000)			(48,000)			(292,000)		(876,000)																								845,000			2,558,000			(98,000)	(294,000)	(27,000)			(58,000)			872,000		2,616,000
Income Tax (Expense) Credit	(257,000,000)	(241,000,000)	(520,000,000)	(620,000,000)																							(1,000,000)			0			0		0		4,000,000	9,000,000															(41,645,000)	(34,185,000)	(108,554,000)	(120,377,000)																			37,000			368,000			193,000	579,000													(27,953,000)	(16,974,000)	(69,102,000)	(45,755,000)																			158,000			537,000			94,000	283,000													(93,141,000)	(82,578,000)	(174,313,000)	(213,290,000)																			(317,000)			(571,000)			1,608,000	5,128,000											(32,217,000)	(35,355,000)	(58,778,000)	(64,872,000)																	(110,000)			(323,000)													(14,935,000)	(25,229,000)	(37,057,000)	(49,206,000)																			296,000			896,000			(34,000)	(103,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	5,000,000		16,000,000				0		0		7,000,000	16,000,000			(3,000,000)		(4,000,000)				1,000,000		4,000,000		5,000,000	16,000,000	(2,000,000)			0			0		0		7,000,000	16,000,000															428,000		1,760,000				359,000	1,075,000			(184,000)		(74,000)				253,000		759,000		428,000	1,760,000	69,000			685,000			359,000	1,075,000													467,000		1,522,000				174,000	525,000			(117,000)		(16,000)				410,000		1,013,000		467,000	1,522,000	293,000			997,000			174,000	525,000													2,396,000		8,463,000				2,985,000	9,524,000			(250,000)		(42,000)				(339,000)		(1,019,000)		2,396,000	8,463,000	(589,000)			(1,061,000)			2,985,000	9,524,000											(204,000)		(601,000)						(14,000)		(31,000)				(190,000)		(570,000)		(204,000)	(601,000)																	485,000		1,471,000				(64,000)	(191,000)			(17,000)		(38,000)				566,000		1,700,000		485,000	1,471,000	549,000			1,662,000			(64,000)	(191,000)
Amortization of Pension and OPEB
Prior Service Cost (Credit)																																					(7,000,000)	(16,000,000)																																											(1,282,000)	(3,847,000)																																									(199,000)	(596,000)																																									(1,451,000)	(4,388,000)																																																																											(446,000)	(1,338,000)
Actuarial (Gains)/Losses																																					18,000,000	41,000,000																																											1,834,000	5,501,000																																									467,000	1,404,000																																									6,044,000	19,040,000																																																																											348,000	1,044,000
Reclassifications from AOCI, before Income Tax (Expense) Credit																											(3,000,000)			0			0		0		11,000,000	25,000,000	(5,000,000)				(6,000,000)				2,000,000			6,000,000																									106,000			1,053,000			552,000	1,654,000	(284,000)				(116,000)				390,000		1,169,000																								451,000			1,534,000			268,000	808,000	(180,000)				(24,000)				631,000		1,558,000																								(906,000)			(1,632,000)			4,593,000	14,652,000	(384,000)			(64,000)			(522,000)		(1,568,000)																						(314,000)			(924,000)			(22,000)			(48,000)			(292,000)		(876,000)																								845,000			2,558,000			(98,000)	(294,000)	(27,000)			(58,000)			872,000		2,616,000
Income Tax (Expense) Credit	(257,000,000)	(241,000,000)	(520,000,000)	(620,000,000)																							(1,000,000)			0			0		0		4,000,000	9,000,000															(41,645,000)	(34,185,000)	(108,554,000)	(120,377,000)																			37,000			368,000			193,000	579,000													(27,953,000)	(16,974,000)	(69,102,000)	(45,755,000)																			158,000			537,000			94,000	283,000													(93,141,000)	(82,578,000)	(174,313,000)	(213,290,000)																			(317,000)			(571,000)			1,608,000	5,128,000											(32,217,000)	(35,355,000)	(58,778,000)	(64,872,000)																	(110,000)			(323,000)													(14,935,000)	(25,229,000)	(37,057,000)	(49,206,000)																			296,000			896,000			(34,000)	(103,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	5,000,000		16,000,000				0		0		7,000,000	16,000,000			(3,000,000)		(4,000,000)				1,000,000		4,000,000		5,000,000	16,000,000	(2,000,000)			0			0		0		7,000,000	16,000,000															428,000		1,760,000				359,000	1,075,000			(184,000)		(74,000)				253,000		759,000		428,000	1,760,000	69,000			685,000			359,000	1,075,000													467,000		1,522,000				174,000	525,000			(117,000)		(16,000)				410,000		1,013,000		467,000	1,522,000	293,000			997,000			174,000	525,000													2,396,000		8,463,000				2,985,000	9,524,000			(250,000)		(42,000)				(339,000)		(1,019,000)		2,396,000	8,463,000	(589,000)			(1,061,000)			2,985,000	9,524,000											(204,000)		(601,000)						(14,000)		(31,000)				(190,000)		(570,000)		(204,000)	(601,000)																	485,000		1,471,000				(64,000)	(191,000)			(17,000)		(38,000)				566,000		1,700,000		485,000	1,471,000	549,000			1,662,000			(64,000)	(191,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	5,000,000		16,000,000				0		0		7,000,000	16,000,000			(3,000,000)		(4,000,000)				1,000,000		4,000,000		5,000,000	16,000,000	(2,000,000)			0			0		0		7,000,000	16,000,000															428,000		1,760,000				359,000	1,075,000			(184,000)		(74,000)				253,000		759,000		428,000	1,760,000	69,000			685,000			359,000	1,075,000													467,000		1,522,000				174,000	525,000			(117,000)		(16,000)				410,000		1,013,000		467,000	1,522,000	293,000			997,000			174,000	525,000													2,396,000		8,463,000				2,985,000	9,524,000			(250,000)		(42,000)				(339,000)		(1,019,000)		2,396,000	8,463,000	(589,000)			(1,061,000)			2,985,000	9,524,000											(204,000)		(601,000)						(14,000)		(31,000)				(190,000)		(570,000)		(204,000)	(601,000)																	485,000		1,471,000				(64,000)	(191,000)			(17,000)		(38,000)				566,000		1,700,000		485,000	1,471,000	549,000			1,662,000			(64,000)	(191,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(38,000,000)		(44,000,000)	(23,000,000)							(1,000,000)	(8,000,000)		(14,000,000)		(3,000,000)	(24,000,000)	(30,000,000)		(30,000,000)		(20,000,000)																																	(258,000)	(285,000)			(34,000)	(644,000)		(1,820,000)		(1,309,000)	2,836,000	2,077,000		1,562,000		1,024,000																											(20,261,000)	(15,284,000)			(19,000)	(446,000)		(1,246,000)		(819,000)	(16,386,000)	(19,647,000)		(19,015,000)		(14,465,000)																											6,135,000	7,706,000			(47,000)	(912,000)		(2,639,000)		(1,748,000)	7,076,000	8,095,000		8,774,000		9,454,000																									6,737,000	7,149,000	(3,000)	21,000		(102,000)		(69,000)	5,891,000	6,460,000		6,839,000		7,218,000																							(16,903,000)	(15,524,000)			(3,000)	22,000		(97,000)		(62,000)	(13,871,000)	(15,571,000)		(16,806,000)		(15,462,000)
Changes in Fair Value Recognized in AOCI					13,000,000	(22,000,000)										16,000,000		(7,000,000)				(3,000,000)		(15,000,000)																																	1,302,000	(946,000)						1,302,000		(946,000)				0		0																											(655,000)	(7,131,000)						887,000		(741,000)				(1,542,000)		(6,390,000)																											1,916,000	(1,486,000)						1,915,000		(1,487,000)				1,000		1,000																									127,000	111,000				126,000		110,000				1,000		1,000																							122,000	(2,672,000)						123,000		106,000				(1,000)		(2,778,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Utility Operations Revenues	3,797,000,000	3,814,000,000	10,539,000,000	10,412,000,000																								0			0								(1,000,000)		0		(1,000,000)		0			0			0		756,606,000	776,066,000	2,299,587,000	2,161,901,000																				(4,000)			(7,000)				(75,000)		(4,000)		(53,000)		(7,000)						537,453,000	499,078,000	1,518,357,000	1,371,070,000																				(10,000)			(19,000)				(173,000)		(10,000)		(89,000)		(19,000)						959,816,000	1,114,339,000	2,710,990,000	3,084,657,000																				(23,000)			(47,000)				(461,000)	(23,000)		(246,000)	(47,000)						408,803,000	364,851,000	986,008,000	968,683,000																		0			0			0			0						534,196,000	473,391,000	1,324,325,000	1,196,753,000																				0			0					0			0
Other Revenues	379,000,000	342,000,000	1,045,000,000	920,000,000																								(1,000,000)			(4,000,000)								(3,000,000)		(1,000,000)		(8,000,000)		(4,000,000)			0			0		2,569,000	3,192,000	6,833,000	7,950,000																																							514,000	768,000	3,552,000	4,453,000																																							2,827,000	5,391,000	12,982,000	14,638,000																																					621,000	1,156,000	2,865,000	2,654,000																																	441,000	680,000	1,163,000	1,403,000
Purchased Electricity for Resale	373,000,000	327,000,000	1,103,000,000	855,000,000																								0			13,000,000								(1,000,000)		0		3,000,000		13,000,000			0			0		47,391,000	45,196,000	172,334,000	155,421,000																				35,000			411,000				21,000		35,000		47,000		411,000						32,976,000	23,399,000	111,602,000	88,797,000																				88,000			1,074,000				47,000		88,000		115,000		1,074,000						34,568,000	46,146,000	114,911,000	156,384,000																				221,000			2,806,000				129,000	221,000		309,000	2,806,000						55,915,000	75,719,000	179,405,000	145,983,000																		0			0			0			0						37,505,000	35,109,000	120,273,000	97,150,000																				0			0					0			0
Other Operation Expense	677,000,000	775,000,000	2,079,000,000	2,150,000,000																																																	64,508,000	92,700,000	223,180,000	239,704,000																				(4,000)			(20,000)				(14,000)		(4,000)		(38,000)		(20,000)						136,702,000	141,728,000	414,418,000	411,218,000																				(1,000)			(11,000)				(8,000)		(1,000)		(23,000)		(11,000)						159,965,000	189,566,000	481,417,000	481,994,000																				(6,000)			(30,000)				(20,000)	(6,000)		(57,000)	(30,000)						60,566,000	58,975,000	162,032,000	154,834,000																		0			(11,000)		(10,000)	0		(25,000)	(11,000)						62,108,000	60,217,000	182,351,000	165,877,000																				1,000			(8,000)				(12,000)	1,000		(28,000)	(8,000)
Maintenance Expense	261,000,000	255,000,000	839,000,000	769,000,000																																																	49,924,000	47,047,000	207,870,000	131,212,000																				12,000			3,000				(11,000)		12,000		(29,000)		3,000						43,448,000	44,308,000	139,200,000	133,817,000																				4,000			0				(5,000)		4,000		(14,000)		0						71,670,000	73,024,000	218,962,000	227,643,000																				7,000			(3,000)				(11,000)	7,000		(26,000)	(3,000)						25,071,000	25,685,000	78,396,000	78,863,000																		5,000			3,000		(5,000)	5,000		(9,000)	3,000						24,654,000	27,816,000	84,725,000	78,835,000																				4,000			1,000				(7,000)	4,000		(14,000)	1,000
Depreciation and Amortization Expense	447,000,000	470,000,000	1,310,000,000	1,353,000,000																																																	84,513,000	86,636,000	255,656,000	252,188,000																				0			0													0		0	45,393,000	37,734,000	131,991,000	109,273,000																				0			0													0		0	94,802,000	130,026,000	289,472,000	401,465,000																				1,000			3,000										2,000	1,000	5,000	3,000	24,191,000	24,433,000	72,449,000	71,356,000																		0			0									0		0	41,846,000	35,144,000	132,460,000	103,820,000																				0			0											0		0
Interest Expense	225,000,000	233,000,000	685,000,000	697,000,000																								1,000,000			3,000,000		0		0						0				0		2,000,000	1,000,000		6,000,000	3,000,000		47,375,000	50,071,000	143,707,000	153,323,000																				261,000			799,000												390,000	261,000	1,169,000	799,000	23,932,000	26,307,000	72,579,000	76,733,000																				149,000			447,000												631,000	149,000	1,558,000	447,000	45,070,000	53,576,000	142,487,000	160,984,000																				(341,000)			(1,023,000)										(524,000)	(341,000)	(1,573,000)	(1,023,000)	13,417,000	13,735,000	40,016,000	42,212,000																		(190,000)			(569,000)								(292,000)	(190,000)	(876,000)	(569,000)	32,614,000	21,498,000	100,151,000	65,210,000																				567,000			2,000,000										872,000	567,000	2,616,000	2,000,000
Property, Plant and Equipment																																							0				0																																	3,000			(9,000)				(15,000)		3,000		(34,000)		(9,000)																													1,000			(6,000)				(10,000)		1,000		(20,000)		(6,000)																													1,000			(15,000)				(21,000)	1,000		(44,000)	(15,000)																											5,000			1,000		(7,000)	5,000		(14,000)	1,000																													3,000			(3,000)				(8,000)	3,000		(16,000)	(3,000)
Regulatory Assets																												0	[1]		2,000,000	[1]							0	[1]	0	[1]	0	[1]	2,000,000	[1]		0	[1]		0	[1]																								114,000	[1]		1,515,000	[1]			(190,000)	[1]	114,000	[1]	(9,000)	[1]	1,515,000	[1]																												20,000	[1]		265,000	[1]			(31,000)	[1]	20,000	[1]	7,000	[1]	265,000	[1]																												0	[1]		0	[1]				0	[1]		0	[1]																										0	[1]		0	[1]		0	[1]		0	[1]																												0	[1]		0	[1]				0	[1]		0	[1]
Ending Balance in AOCI	(25,000,000)		(25,000,000)		(31,000,000)	(31,000,000)							(1,000,000)	(8,000,000)		1,000,000		1,000,000	(24,000,000)	(30,000,000)		(32,000,000)		(32,000,000)																																	1,461,000	1,461,000			(34,000)	(644,000)		(362,000)		(362,000)	2,836,000	2,077,000		1,823,000		1,823,000																											(20,665,000)	(20,665,000)			(19,000)	(446,000)		(257,000)		(257,000)	(16,386,000)	(19,647,000)		(20,408,000)		(20,408,000)																											7,911,000	7,911,000			(47,000)	(912,000)		(524,000)		(524,000)	7,076,000	8,095,000		8,435,000		8,435,000																									6,684,000	6,684,000	(3,000)	21,000		34,000		34,000	5,891,000	6,460,000		6,650,000		6,650,000																							(16,206,000)	(16,206,000)			(3,000)	22,000		34,000		34,000	(13,871,000)	(15,571,000)		(16,240,000)		(16,240,000)
Total Accumulated Other Comprehensive Income (Loss) Activity For Other Temporary Investments
Beginning Balance in AOCI								3,000,000		2,000,000
Changes in Fair Value Recognized in AOCI								1,000,000		2,000,000
Interest Income	3,000,000	2,000,000	55,000,000	6,000,000																													0	0	0	0
Ending Balance in AOCI								$ 4,000,000		$ 4,000,000

[1] Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.