Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2022

AEP


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	30.7	$	32.3	$	1.8	$	2.4
Interest Cost	37.1		34.3		7.3		7.7
Expected Return on Plan Assets	(63.4)		(57.4)		(27.5)		(22.8)
Amortization of Prior Service Credit	—		—		(17.9)		(17.8)
Amortization of Net Actuarial Loss	15.8		25.3		—		—
Net Periodic Benefit Cost (Credit)	$	20.2	$	34.5	$	(36.3)	$	(30.5)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	92.3	$	96.9	$	5.5	$	7.2
Interest Cost	111.2		102.9		21.9		22.9
Expected Return on Plan Assets	(190.1)		(172.3)		(82.5)		(68.4)
Amortization of Prior Service Credit	—		—		(53.6)		(53.2)
Amortization of Net Actuarial Loss	47.3		76.1		—		—
Net Periodic Benefit Cost (Credit)	$	60.7	$	103.6	$	(108.7)	$	(91.5)

AEP Texas


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	2.8	$	3.0	$	0.1	$	0.2
Interest Cost	3.1		2.8		0.6		0.6
Expected Return on Plan Assets	(5.3)		(4.9)		(2.3)		(1.9)
Amortization of Prior Service Credit	—		—		(1.5)		(1.5)
Amortization of Net Actuarial Loss	1.2		2.1		—		—
Net Periodic Benefit Cost (Credit)	$	1.8	$	3.0	$	(3.1)	$	(2.6)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	8.4	$	8.9	$	0.3	$	0.5
Interest Cost	9.1		8.4		1.7		1.8
Expected Return on Plan Assets	(15.8)		(14.6)		(6.8)		(5.6)
Amortization of Prior Service Credit	—		—		(4.5)		(4.5)
Amortization of Net Actuarial Loss	3.8		6.2		—		—
Net Periodic Benefit Cost (Credit)	$	5.5	$	8.9	$	(9.3)	$	(7.8)

APCo


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	2.9	$	3.0	$	0.2	$	0.3
Interest Cost	4.3		4.1		1.2		1.3
Expected Return on Plan Assets	(8.1)		(7.3)		(4.1)		(3.4)
Amortization of Prior Service Credit	—		—		(2.6)		(2.6)
Amortization of Net Actuarial Loss	1.9		3.0		—		—
Net Periodic Benefit Cost (Credit)	$	1.0	$	2.8	$	(5.3)	$	(4.4)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	8.6	$	8.9	$	0.6	$	0.8
Interest Cost	13.1		12.3		3.5		3.7
Expected Return on Plan Assets	(24.3)		(21.8)		(12.2)		(10.1)
Amortization of Prior Service Credit	—		—		(7.8)		(7.8)
Amortization of Net Actuarial Loss	5.5		9.0		—		—
Net Periodic Benefit Cost (Credit)	$	2.9	$	8.4	$	(15.9)	$	(13.4)

I&M


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	4.0	$	4.4	$	0.2	$	0.4
Interest Cost	4.3		4.0		0.8		0.8
Expected Return on Plan Assets	(8.1)		(7.2)		(3.3)		(2.7)
Amortization of Prior Service Credit	—		—		(2.4)		(2.5)
Amortization of Net Actuarial Loss	1.8		2.9		—		—
Net Periodic Benefit Cost (Credit)	$	2.0	$	4.1	$	(4.7)	$	(4.0)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	12.1	$	13.1	$	0.7	$	1.0
Interest Cost	12.7		12.1		2.5		2.6
Expected Return on Plan Assets	(24.2)		(21.6)		(10.2)		(8.3)
Amortization of Prior Service Credit	—		—		(7.3)		(7.3)
Amortization of Net Actuarial Loss	5.3		8.8		—		—
Net Periodic Benefit Cost (Credit)	$	5.9	$	12.4	$	(14.3)	$	(12.0)

OPCo


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	2.8	$	2.9	$	0.2	$	0.2
Interest Cost	3.4		3.1		0.7		0.7
Expected Return on Plan Assets	(6.2)		(5.7)		(3.0)		(2.4)
Amortization of Prior Service Credit	—		—		(1.8)		(1.7)
Amortization of Net Actuarial Loss	1.3		2.3		—		—
Net Periodic Benefit Cost (Credit)	$	1.3	$	2.6	$	(3.9)	$	(3.2)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	8.4	$	8.6	$	0.5	$	0.6
Interest Cost	10.0		9.3		2.2		2.3
Expected Return on Plan Assets	(18.6)		(16.8)		(8.9)		(7.3)
Amortization of Prior Service Credit	—		—		(5.4)		(5.3)
Amortization of Net Actuarial Loss	4.1		6.8		—		—
Net Periodic Benefit Cost (Credit)	$	3.9	$	7.9	$	(11.6)	$	(9.7)

PSO


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	1.8	$	2.0	$	0.2	$	0.1
Interest Cost	1.8		1.7		0.4		0.4
Expected Return on Plan Assets	(3.3)		(3.0)		(1.6)		(1.3)
Amortization of Prior Service Credit	—		—		(1.1)		(1.1)
Amortization of Net Actuarial Loss	0.7		1.2		—		—
Net Periodic Benefit Cost (Credit)	$	1.0	$	1.9	$	(2.1)	$	(1.9)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	5.5	$	6.0	$	0.4	$	0.4
Interest Cost	5.3		5.0		1.1		1.2
Expected Return on Plan Assets	(10.1)		(9.2)		(4.6)		(3.8)
Amortization of Prior Service Credit	—		—		(3.3)		(3.3)
Amortization of Net Actuarial Loss	2.2		3.7		—		—
Net Periodic Benefit Cost (Credit)	$	2.9	$	5.5	$	(6.4)	$	(5.5)

SWEPCo


	Pension Plans				OPEB
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	2.7	$	2.7	$	0.1	$	0.3
Interest Cost	2.2		2.2		0.5		0.4
Expected Return on Plan Assets	(3.6)		(3.3)		(1.8)		(1.5)
Amortization of Prior Service Credit	—		—		(1.4)		(1.4)
Amortization of Net Actuarial Loss	0.9		1.5		—		—
Net Periodic Benefit Cost (Credit)	$	2.2	$	3.1	$	(2.6)	$	(2.2)

	Pension Plans				OPEB
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
	(in millions)
Service Cost	$	8.0	$	8.4	$	0.4	$	0.6
Interest Cost	6.8		6.4		1.4		1.4
Expected Return on Plan Assets	(10.9)		(10.1)		(5.5)		(4.5)
Amortization of Prior Service Credit	—		—		(4.0)		(4.0)
Amortization of Net Actuarial Loss	2.8		4.6		—		—
Net Periodic Benefit Cost (Credit)	$	6.7	$	9.3	$	(7.7)	$	(6.5)