Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2022

Asset Retirement Obligation (ARO)

Company	ARO as of December 31, 2021		Accretion Expense		Liabilities Incurred		Liabilities Settled		Revisions in Cash Flow Estimates		ARO as of September 30, 2022
	(in millions)
AEP (a)(b)(c)(d)(e)	$	2,741.7	$	82.1	$	37.4	$	(29.4)	$	90.9	$	2,922.7
PSO (a)(d)	57.6		3.0		12.8		(0.6)		1.9		74.7
SWEPCo (a)(c)(d)	222.7		8.3		15.4		(16.9)		48.0		277.5

(a)Includes ARO related to ash disposal facilities.

(b)Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.98 billion and $1.93 billion as of September 30, 2022 and December 31, 2021, respectively.

(c)Includes ARO related to Sabine and DHLC.

(d)Includes ARO related to asbestos removal.

(e)Includes $18 million and $18 million as of September 30, 2022 and December 31, 2021, respectively, of ARO classified as Liabilities Held for Sale on the balance sheets. See “Disposition of KPCo and KTCo” section of Note 6 for additional information.