Business Segments (Tables)

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Reportable Segment Information

	Vertically Integrated Utilities			Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing			AEP River Operations			Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
Three Months Ended   September 30, 2014
Revenues from:
External Customers	$	2,432	(b)	$	1,163	$	21	$	538	(b)	$	141		$	7	$	—		(c)	$	4,302
Other Operating Segments	18		(b)	68		34		363		(b)	14			19		(516		)		—
Total Revenues	$	2,450		$	1,231	$	55	$	901		$	155		$	26	$	(516	)		$	4,302
Net Income	$	220		$	92	$	43	$	117		$	11		$	11	$	—			$	494
	Vertically Integrated Utilities			Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing			AEP River Operations			Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
Three Months Ended   September 30, 2013
Revenues from:
External Customers	$	2,543		$	1,139	$	9	$	359		$	126		$	12	$	(12	)	(c)	$	4,176
Other Operating Segments	195			56		17		642			4			16		(930		)		—
Total Revenues	$	2,738		$	1,195	$	26	$	1,001		$	130		$	28	$	(942	)		$	4,176
Net Income (Loss)	$	174		$	119	$	22	$	112		$	(1	)	$	8	$	—			$	434

	Vertically Integrated Utilities			Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing			AEP River Operations			Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
Nine Months Ended   September 30, 2014
Revenues from:
External Customers	$	7,217	(b)	$	3,388	$	54	$	1,932	(b)	$	435		$	19	$	(51	)	(c)	$	12,994
Other Operating Segments	71		(b)	192		86		1,133		(b)	45			55		(1,582		)		—
Total Revenues	$	7,288		$	3,580	$	140	$	3,065		$	480		$	74	$	(1,633	)		$	12,994
Net Income	$	654		$	279	$	114	$	378		$	17		$	4	$	—			$	1,446
	Vertically Integrated Utilities			Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing			AEP River Operations			Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
Nine Months Ended   September 30, 2013
Revenues from:
External Customers	$	7,075		$	3,248	$	18	$	915		$	365		$	26	$	(63	)	(c)	$	11,584
Other Operating Segments	480			145		35		1,898			15			41		(2,614		)		—
Total Revenues	$	7,555		$	3,393	$	53	$	2,813		$	380		$	67	$	(2,677	)		$	11,584
Net Income (Loss)	$	508		$	281	$	53	$	188		$	(12	)	$	119	$	—			$	1,137

	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		AEP River Operations		Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
September 30, 2014
Total Property, Plant and Equipment	$	38,857	$	12,792	$	2,378	$	8,363	$	673	$	331	$	(271	)	(d)	$	63,123
Accumulated Depreciation and Amortization	12,728		3,447		20		3,563		212		183		(94		)	(d)	20,059
Total Property Plant and Equipment - Net	$	26,129	$	9,345	$	2,358	$	4,800	$	461	$	148	$	(177	)	(d)	$	43,064
Total Assets	$	33,072	$	13,822	$	3,000	$	6,280	$	686	$	20,706	$	(19,641	)	(d) (e)	$	57,925
Long-term Debt Due Within One Year:
Affiliated	$	131	$	—	$	—	$	86	$	—	$	—	$	(217	)		$	—
Non-Affiliated	1,309		405		—		661		3		3		—				2,381
Long-term Debt:
Affiliated	20		—		—		32		—		—		(52		)		—
Non-Affiliated	8,574		5,189		699		297		81		837		—				15,677
Total Long-term Debt	$	10,034	$	5,594	$	699	$	1,076	$	84	$	840	$	(269	)		$	18,058
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		AEP River Operations		Corporate and Other (a)		Reconciling Adjustments				Consolidated
	(in millions)
December 31, 2013
Total Property, Plant and Equipment	$	37,545	$	12,143	$	1,636	$	8,277	$	638	$	315	$	(269	)	(d)	$	60,285
Accumulated Depreciation and Amortization	12,250		3,342		10		3,409		189		173		(85		)	(d)	19,288
Total Property Plant and Equipment - Net	$	25,295	$	8,801	$	1,626	$	4,868	$	449	$	142	$	(184	)	(d)	$	40,997
Total Assets	$	32,791	$	14,165	$	2,245	$	6,426	$	673	$	19,645	$	(19,531	)	(d) (e)	$	56,414
Long-term Debt Due Within One Year:
Affiliated	$	—	$	—	$	—	$	179	$	5	$	—	$	(184	)		$	—
Non-Affiliated	720		697		—		126		2		4		—				1,549
Long-term Debt:
Affiliated	151		—		—		118		10		—		(279		)		—
Non-Affiliated	9,265		5,360		620		664		83		836		—				16,828
Total Long-term Debt	$	10,136	$	6,057	$	620	$	1,087	$	100	$	840	$	(463	)		$	18,377

(a) Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent's guarantee revenue received from affiliates, investment income, interest income and interest expense and other nonallocated costs.

(b) Includes the impact of the corporate separation of OPCo's generation assets and liabilities that took effect December 31, 2013, as well as the impact of the termination of the Interconnection Agreement effective January 1, 2014.

(c) Reconciling Adjustments for External Customers primarily include eliminations as a result of corporate separation in Ohio.

(d) Includes eliminations due to an intercompany capital lease.

(e) Reconciling Adjustments for Total Assets primarily include the elimination of intercompany advances to affiliates and intercompany accounts receivable along with the elimination of AEP's investments in subsidiary companies.