STOCK-BASED COMPENSATION - Performance Shares Earned (Details) - Performance Shares - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Score	109.80%	106.10%	131.10%
Performance Shares Earned (in shares)	477,487	540,863	512,660
Performance Shares Mandatorily Deferred as AEP Career Shares (in shares)	39,172	70,377	28,282
Performance Shares Voluntarily Deferred into the Incentive Compensation Deferral Program (in shares)	21,245	22,716	23,609
Performance Shares to be Settled (in shares)	417,070	447,770	460,769