BUSINESS SEGMENTS - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 segment company
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
AEP TEXAS INC.
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
APPALACHIAN POWER COMPANY
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
INDIANA MICHIGAN POWER COMPANY
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
OHIO POWER COMPANY
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
PUBLIC SERVICE COMPANY OF OKLAHOMA
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
SOUTHWESTERN ELECTRIC POWER COMPANY
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
AEP TRANSMISSION COMPANY, LLC
Segment Reporting Information [Line Items]
Number of Reportable Segments	1
Number of Operating Segments	7
Number Of FERC-Regulated Transmission-Only Electric Utilities | company	7