REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	$ 21,702	$ 19,970	$ 19,456
TOTAL REVENUES	21,876	19,721	18,982
Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	0	0	0
Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	16,000	15,077	14,947
Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	7,754	7,318	7,088
Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	4,694	4,298	4,176
Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,250	3,173	3,389
Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	302	288	294
Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	5,220	4,467	4,080
Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,220	851	774
Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,603	1,611	1,477
Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		19	74
Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,397	1,986	1,755
Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	482	426	429
TOTAL REVENUES	526	482	458
Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	174	(249)	(474)
Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	61	(79)	(118)
Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	113	(170)	(356)
AEP TEXAS INC.
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,194	2,081	1,906
TOTAL REVENUES	2,199	2,080	1,902
AEP TEXAS INC. | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,436	1,372	1,251
AEP TEXAS INC. | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	758	725	656
AEP TEXAS INC. | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	474	467	415
AEP TEXAS INC. | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	161	141	145
AEP TEXAS INC. | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	43	39	35
AEP TEXAS INC. | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	717	673	619
AEP TEXAS INC. | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TEXAS INC. | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	717	673	619
AEP TEXAS INC. | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	41	36	36
TOTAL REVENUES	7	4	5
AEP TEXAS INC. | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	5	(1)	(4)
AEP TEXAS INC. | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	5	(1)	(4)
AEP TEXAS INC. | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
AEP TRANSMISSION COMPANY, LLC
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,249	1,951	1,720
TOTAL REVENUES	2,319	1,891	1,671
AEP TRANSMISSION COMPANY, LLC | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,213	1,925	1,704
AEP TRANSMISSION COMPANY, LLC | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEP TRANSMISSION COMPANY, LLC | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,213	1,925	1,704
AEP TRANSMISSION COMPANY, LLC | Transmission Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,800	1,600	1,400
AEP TRANSMISSION COMPANY, LLC | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	36	26	16
AEP TRANSMISSION COMPANY, LLC | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	70	(60)	(49)
AEP TRANSMISSION COMPANY, LLC | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	70	(60)	(49)
AEP TRANSMISSION COMPANY, LLC | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
APPALACHIAN POWER COMPANY
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	4,183	4,039	3,740
TOTAL REVENUES	4,209	4,033	3,721
APPALACHIAN POWER COMPANY | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,548	3,462	3,197
APPALACHIAN POWER COMPANY | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,863	1,772	1,613
APPALACHIAN POWER COMPANY | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	775	764	700
APPALACHIAN POWER COMPANY | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	799	813	778
APPALACHIAN POWER COMPANY | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	111	113	106
APPALACHIAN POWER COMPANY | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	547	490	469
APPALACHIAN POWER COMPANY | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	372	305	288
APPALACHIAN POWER COMPANY | Generation Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	165
APPALACHIAN POWER COMPANY | Generation Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		159	159
APPALACHIAN POWER COMPANY | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	175	185	181
APPALACHIAN POWER COMPANY | Transmission Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	79	87	93
APPALACHIAN POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	88	87	74
TOTAL REVENUES	18	16	18
APPALACHIAN POWER COMPANY | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	26	(6)	(19)
APPALACHIAN POWER COMPANY | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	26	(6)	(19)
APPALACHIAN POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
INDIANA MICHIGAN POWER COMPANY
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,051	2,604	2,522
TOTAL REVENUES	3,031	2,572	2,536
INDIANA MICHIGAN POWER COMPANY | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,305	2,053	2,036
INDIANA MICHIGAN POWER COMPANY | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	895	847	842
INDIANA MICHIGAN POWER COMPANY | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	802	605	575
INDIANA MICHIGAN POWER COMPANY | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	603	596	614
INDIANA MICHIGAN POWER COMPANY | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	5	5	5
INDIANA MICHIGAN POWER COMPANY | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	632	435	366
INDIANA MICHIGAN POWER COMPANY | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	581	394	327
INDIANA MICHIGAN POWER COMPANY | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	51	41	39
INDIANA MICHIGAN POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	114	116	120
INDIANA MICHIGAN POWER COMPANY | Other Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	70
INDIANA MICHIGAN POWER COMPANY | Other Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		75	68
INDIANA MICHIGAN POWER COMPANY | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	(20)	(32)	14
INDIANA MICHIGAN POWER COMPANY | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	(9)	(8)	(11)
INDIANA MICHIGAN POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	(11)	(24)	25
OHIO POWER COMPANY
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,880	3,781	3,803
TOTAL REVENUES	3,948	3,828	3,811
OHIO POWER COMPANY | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,567	3,523	3,548
OHIO POWER COMPANY | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,026	2,031	1,954
OHIO POWER COMPANY | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,151	1,101	1,082
OHIO POWER COMPANY | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	373	374	497
OHIO POWER COMPANY | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	17	17	15
OHIO POWER COMPANY | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	95	96	83
OHIO POWER COMPANY | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
OHIO POWER COMPANY | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	95	96	83
OHIO POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	218	162	172
TOTAL REVENUES	12	12	12
OHIO POWER COMPANY | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	68	47	8
OHIO POWER COMPANY | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	46	27	(15)
OHIO POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	22	20	23
PUBLIC SERVICE COMPANY OF OKLAHOMA
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,019	1,849	1,977
TOTAL REVENUES	2,022	1,846	1,977
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,914	1,759	1,906
PUBLIC SERVICE COMPANY OF OKLAHOMA | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	884	800	831
PUBLIC SERVICE COMPANY OF OKLAHOMA | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	554	510	539
PUBLIC SERVICE COMPANY OF OKLAHOMA | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	369	349	423
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	107	100	113
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	71	51	49
PUBLIC SERVICE COMPANY OF OKLAHOMA | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	25	9	12
PUBLIC SERVICE COMPANY OF OKLAHOMA | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	46	42	37
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	34	39	22
TOTAL REVENUES	11	19	8
PUBLIC SERVICE COMPANY OF OKLAHOMA | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	3	(3)	0
PUBLIC SERVICE COMPANY OF OKLAHOMA | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues		(3)	0
PUBLIC SERVICE COMPANY OF OKLAHOMA | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
SOUTHWESTERN ELECTRIC POWER COMPANY
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,336	2,043	2,192
TOTAL REVENUES	2,354	2,036	2,183
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,907	1,661	1,835
SOUTHWESTERN ELECTRIC POWER COMPANY | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	856	726	800
SOUTHWESTERN ELECTRIC POWER COMPANY | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	636	558	609
SOUTHWESTERN ELECTRIC POWER COMPANY | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	403	368	416
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	12	9	10
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	391	349	328
SOUTHWESTERN ELECTRIC POWER COMPANY | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	196	177	177
SOUTHWESTERN ELECTRIC POWER COMPANY | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	195	172	151
SOUTHWESTERN ELECTRIC POWER COMPANY | Transmission Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	75	65	73
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	38	33	29
TOTAL REVENUES	10	7	2
SOUTHWESTERN ELECTRIC POWER COMPANY | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	18	(7)	(9)
SOUTHWESTERN ELECTRIC POWER COMPANY | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues		(7)	(9)
SOUTHWESTERN ELECTRIC POWER COMPANY | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
Operating Segments
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	24,105	21,501	20,524
Operating Segments | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	2,262	1,837	1,603
Corporate and Other
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	137	186	152
TOTAL REVENUES	144	183	168
Corporate and Other | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	111	126	107
Corporate and Other | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	1	1
Corporate and Other | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Corporate and Other | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		0	0
Corporate and Other | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	1	1
Corporate and Other | Retail, Trading and Marketing Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers			100
Corporate and Other | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	137	185	151
Corporate and Other | Other Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	113	137
Corporate and Other | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	7	(3)	16
Corporate and Other | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
Corporate and Other | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	7	(3)	16
Corporate and Other | AEP TRANSMISSION COMPANY, LLC
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	0	0	0
Reconciling Adjustments
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(2,280)	(1,935)	(1,668)
TOTAL REVENUES	(2,373)	(1,963)	(1,710)
Reconciling Adjustments | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	(2,373)	(1,963)	(1,710)
Reconciling Adjustments | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(1)	(1)	(1)
Reconciling Adjustments | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Reconciling Adjustments | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Reconciling Adjustments | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(1)	(1)	(1)
Reconciling Adjustments | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Reconciling Adjustments | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(2,083)	(1,720)	(1,507)
Reconciling Adjustments | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
Reconciling Adjustments | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(2,017)	(1,620)	(1,418)
Reconciling Adjustments | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		(4)	(7)
Reconciling Adjustments | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(66)	(96)	(82)
Reconciling Adjustments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	(196)	(214)	(160)
Reconciling Adjustments | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	(93)	(28)	(42)
Reconciling Adjustments | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	(85)	(30)	(26)
Reconciling Adjustments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	(8)	2	(16)
Reconciling Adjustments | AEP TRANSMISSION COMPANY, LLC
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	0	0	0
VIU | Transmission Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	211	177	205
VIU | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	12,799	11,642	11,460
TOTAL REVENUES	12,819	11,597	11,450
VIU | Operating Segments | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	263	183	146
VIU | Operating Segments | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	10,997	10,184	10,149
VIU | Operating Segments | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	4,969	4,562	4,479
VIU | Operating Segments | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	3,068	2,731	2,679
VIU | Operating Segments | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,718	2,659	2,748
VIU | Operating Segments | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	242	232	243
VIU | Operating Segments | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,566	1,231	1,107
VIU | Operating Segments | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,033	748	663
VIU | Operating Segments | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	533	483	444
VIU | Operating Segments | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		0	0
VIU | Operating Segments | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
VIU | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	236	227	204
VIU | Operating Segments | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	20	(45)	(10)
VIU | Operating Segments | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	29	(22)	(35)
VIU | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	(9)	(23)	25
T&D | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	6,075	5,862	5,709
TOTAL REVENUES	6,147	5,908	5,713
T&D | Operating Segments | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	50	28	36
T&D | Operating Segments | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	5,004	4,894	4,799
T&D | Operating Segments | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,785	2,756	2,609
T&D | Operating Segments | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,626	1,567	1,497
T&D | Operating Segments | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	533	515	642
T&D | Operating Segments | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	60	56	51
T&D | Operating Segments | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	812	770	702
T&D | Operating Segments | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
T&D | Operating Segments | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	812	770	702
T&D | Operating Segments | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		0	0
T&D | Operating Segments | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
T&D | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	259	198	208
T&D | Operating Segments | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	72	46	4
T&D | Operating Segments | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	51	26	(20)
T&D | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	21	20	24
AEPTHCo | Transmission Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	1,800	1,600	1,500
AEPTHCo | Alternative Revenue Programs | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	57
AEPTHCo | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,311	2,004	1,766
TOTAL REVENUES	2,377	1,951	1,729
AEPTHCo | Operating Segments | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,275	1,978	1,749
AEPTHCo | Operating Segments | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,275	1,978	1,749
AEPTHCo | Operating Segments | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		0	0
AEPTHCo | Operating Segments | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
AEPTHCo | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	36	26	17
AEPTHCo | Operating Segments | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	66	(53)	(37)
AEPTHCo | Operating Segments | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	66	(53)	(37)
AEPTHCo | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
G&M | Retail, Trading and Marketing Revenues | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	66	96	82
G&M | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,660	2,211	2,037
TOTAL REVENUES	2,762	2,045	1,632
G&M | Operating Segments | Related Party
Disaggregation of Revenue [Line Items]
TOTAL REVENUES	65	100	89
G&M | Operating Segments | Total Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Residential Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Commercial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Industrial Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Other Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Total Wholesale and Competitive Retail Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,650	2,207	2,028
G&M | Operating Segments | Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	187	103	111
G&M | Operating Segments | Transmission Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	0	0	0
G&M | Operating Segments | Renewable Generation Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers		23	81
G&M | Operating Segments | Retail, Trading and Marketing Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,463	2,081	1,836
G&M | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	10	4	9
G&M | Operating Segments | Total Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	102	(166)	(405)
G&M | Operating Segments | Alternative Revenue Programs
Disaggregation of Revenue [Line Items]
Total Other Revenues	0	0	0
G&M | Operating Segments | Other Revenues
Disaggregation of Revenue [Line Items]
Total Other Revenues	102	$ (166)	$ (405)
AEP TRANSMISSION COMPANY, LLC | Alternative Revenue Programs | Related Party
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	$ 56