PROPERTY, PLANT AND EQUIPMENT (Tables)

9 Months Ended

Sep. 30, 2026

Property, Plant, and Equipment [Abstract]

Schedule of Asset Retirement Obligation (ARO)


Company	ARO as of December 31, 2025		Accretion Expense		Liabilities Incurred		Liabilities Settled		Revisions in Cash Flow Estimates (a)		ARO as of September 30, 2026
	(in millions)
AEP (b)(c)(d)(e)(f)	$	3,712	$	131	$	11	$	(72)	$	43	$	3,825




PSO (b)(e)(f)	143		7		8		(5)		19		172
SWEPCo (b)(d)(e)(f)	290		12		—		(42)		4		264

(a)Unless discussed above, primarily related to ash ponds, landfills and mine reclamation, generally due to changes in estimated closure area, volumes and/or unit costs.

(b)Includes ARO related to ash disposal facilities.

(c)Includes ARO related to nuclear decommissioning costs for the Cook Plant.

(d)Includes ARO related to Sabine and DHLC.

(e)Includes ARO related to asbestos removal.

(f)Includes ARO related to renewables.