Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2020

Components of Net Periodic Benefit Cost

AEP

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	28.0	$	23.9	$	2.5	$	2.3
Interest Cost	41.9		51.1		10.0		12.7
Expected Return on Plan Assets	(66.2)		(74.0)		(24.0)		(23.5)
Amortization of Prior Service Credit	—		—		(17.5)		(17.2)
Amortization of Net Actuarial Loss	23.4		14.4		1.5		5.6
Net Periodic Benefit Cost (Credit)	$	27.1	$	15.4	$	(27.5)	$	(20.1)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	56.0	$	47.8	$	5.0	$	4.7
Interest Cost	83.9		102.2		19.9		25.3
Expected Return on Plan Assets	(132.4)		(148.0)		(47.9)		(46.9)
Amortization of Prior Service Credit	—		—		(34.9)		(34.5)
Amortization of Net Actuarial Loss	46.8		28.8		3.0		11.1
Net Periodic Benefit Cost (Credit)	$	54.3	$	30.8	$	(54.9)	$	(40.3)

AEP Texas

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	2.4	$	2.2	$	0.2	$	0.2
Interest Cost	3.5		4.3		0.8		1.0
Expected Return on Plan Assets	(5.7)		(6.5)		(2.0)		(1.9)
Amortization of Prior Service Credit	—		—		(1.6)		(1.4)
Amortization of Net Actuarial Loss	2.0		1.3		0.2		0.4
Net Periodic Benefit Cost (Credit)	$	2.2	$	1.3	$	(2.4)	$	(1.7)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	5.0	$	4.3	$	0.4	$	0.4
Interest Cost	7.0		8.7		1.6		2.0
Expected Return on Plan Assets	(11.4)		(12.9)		(4.0)		(3.9)
Amortization of Prior Service Credit	—		—		(3.0)		(2.9)
Amortization of Net Actuarial Loss	3.9		2.5		0.3		0.9
Net Periodic Benefit Cost (Credit)	$	4.5	$	2.6	$	(4.7)	$	(3.5)

APCo

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	2.6	$	2.3	$	0.2	$	0.2
Interest Cost	5.1		6.3		1.7		2.1
Expected Return on Plan Assets	(8.4)		(9.3)		(3.7)		(3.6)
Amortization of Prior Service Credit	—		—		(2.6)		(2.5)
Amortization of Net Actuarial Loss	2.8		1.7		0.3		0.9
Net Periodic Benefit Cost (Credit)	$	2.1	$	1.0	$	(4.1)	$	(2.9)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	5.2	$	4.7	$	0.5	$	0.5
Interest Cost	10.2		12.6		3.3		4.3
Expected Return on Plan Assets	(16.8)		(18.7)		(7.3)		(7.3)
Amortization of Prior Service Credit	—		—		(5.1)		(5.0)
Amortization of Net Actuarial Loss	5.6		3.5		0.5		1.8
Net Periodic Benefit Cost (Credit)	$	4.2	$	2.1	$	(8.1)	$	(5.7)

I&M

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	3.8	$	3.3	$	0.4	$	0.4
Interest Cost	4.9		5.9		1.1		1.4
Expected Return on Plan Assets	(8.3)		(9.2)		(2.9)		(2.9)
Amortization of Prior Service Credit	—		—		(2.4)		(2.3)
Amortization of Net Actuarial Loss	2.7		1.7		0.2		0.6
Net Periodic Benefit Cost (Credit)	$	3.1	$	1.7	$	(3.6)	$	(2.8)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	7.7	$	6.7	$	0.7	$	0.7
Interest Cost	9.8		11.9		2.3		2.9
Expected Return on Plan Assets	(16.6)		(18.4)		(5.8)		(5.7)
Amortization of Prior Service Credit	—		—		(4.8)		(4.7)
Amortization of Net Actuarial Loss	5.4		3.3		0.4		1.3
Net Periodic Benefit Cost (Credit)	$	6.3	$	3.5	$	(7.2)	$	(5.5)

OPCo

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	2.4	$	2.0	$	0.3	$	0.2
Interest Cost	3.8		4.8		1.1		1.3
Expected Return on Plan Assets	(6.5)		(7.4)		(2.7)		(2.7)
Amortization of Prior Service Credit	—		—		(1.7)		(1.7)
Amortization of Net Actuarial Loss	2.2		1.4		0.1		0.7
Net Periodic Benefit Cost (Credit)	$	1.9	$	0.8	$	(2.9)	$	(2.2)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	4.8	$	4.0	$	0.5	$	0.4
Interest Cost	7.7		9.5		2.1		2.7
Expected Return on Plan Assets	(13.1)		(14.7)		(5.3)		(5.4)
Amortization of Prior Service Credit	—		—		(3.5)		(3.4)
Amortization of Net Actuarial Loss	4.3		2.7		0.3		1.3
Net Periodic Benefit Cost (Credit)	$	3.7	$	1.5	$	(5.9)	$	(4.4)

PSO

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	1.8	$	1.7	$	0.1	$	0.1
Interest Cost	2.2		2.7		0.5		0.6
Expected Return on Plan Assets	(3.7)		(4.1)		(1.3)		(1.3)
Amortization of Prior Service Credit	—		—		(1.1)		(1.0)
Amortization of Net Actuarial Loss	1.2		0.7		0.1		0.3
Net Periodic Benefit Cost (Credit)	$	1.5	$	1.0	$	(1.7)	$	(1.3)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	3.6	$	3.3	$	0.3	$	0.3
Interest Cost	4.3		5.3		1.0		1.3
Expected Return on Plan Assets	(7.3)		(8.2)		(2.6)		(2.6)
Amortization of Prior Service Credit	—		—		(2.2)		(2.1)
Amortization of Net Actuarial Loss	2.4		1.5		0.2		0.6
Net Periodic Benefit Cost (Credit)	$	3.0	$	1.9	$	(3.3)	$	(2.5)

SWEPCo

	Pension Plans				OPEB
	Three Months Ended June 30,				Three Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	2.4	$	2.2	$	0.2	$	0.2
Interest Cost	2.6		3.1		0.7		0.8
Expected Return on Plan Assets	(3.9)		(4.5)		(1.7)		(1.5)
Amortization of Prior Service Credit	—		—		(1.3)		(1.3)
Amortization of Net Actuarial Loss	1.4		0.8		0.1		0.4
Net Periodic Benefit Cost (Credit)	$	2.5	$	1.6	$	(2.0)	$	(1.4)
	Pension Plans				OPEB
	Six Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Service Cost	$	4.9	$	4.3	$	0.4	$	0.4
Interest Cost	5.1		6.2		1.3		1.6
Expected Return on Plan Assets	(7.8)		(8.9)		(3.2)		(3.0)
Amortization of Prior Service Credit	—		—		(2.6)		(2.6)
Amortization of Net Actuarial Loss	2.8		1.7		0.2		0.7
Net Periodic Benefit Cost (Credit)	$	5.0	$	3.3	$	(3.9)	$	(2.9)