Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2021

Changes in Accumulated Other Comprehensive Income (Loss) by Component

AEP

	Cash Flow Hedges					Pension
Three Months Ended September 30, 2021	Commodity		Interest Rate			and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2021	$	110.3	$	(32.2)		$	18.9	$	97.0
Change in Fair Value Recognized in AOCI	220.8		4.9		(a)	—		225.7
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity for Resale (b)	(59.7)		—			—		(59.7)
Interest Expense (b)	—		1.5			—		1.5
Amortization of Prior Service Cost (Credit)	—		—			(4.8)		(4.8)
Amortization of Actuarial (Gains) Losses	—		—			2.3		2.3
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(59.7)		1.5			(2.5)		(60.7)
Income Tax (Expense) Benefit	(12.5)		0.3			(0.5)		(12.7)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(47.2)		1.2			(2.0)		(48.0)
Net Current Period Other Comprehensive Income (Loss)	173.6		6.1			(2.0)		177.7
Balance in AOCI as of September 30, 2021	$	283.9	$	(26.1)		$	16.9	$	274.7

	Cash Flow Hedges					Pension
Three Months Ended September 30, 2020	Commodity		Interest Rate			and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2020	$	(81.4)	$	(55.3)		$	(36.2)	$	(172.9)
Change in Fair Value Recognized in AOCI	10.2		1.9		(a)	—		12.1
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (b)	(0.1)		—			—		(0.1)
Purchased Electricity for Resale (b)	33.3		—			—		33.3
Interest Expense (b)	—		1.3			—		1.3
Amortization of Prior Service Cost (Credit)	—		—			(4.9)		(4.9)
Amortization of Actuarial (Gains) Losses	—		—			2.6		2.6
Reclassifications from AOCI, before Income Tax (Expense) Benefit	33.2		1.3			(2.3)		32.2
Income Tax (Expense) Benefit	7.1		0.2			(0.5)		6.8
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	26.1		1.1			(1.8)		25.4
Net Current Period Other Comprehensive Income (Loss)	36.3		3.0			(1.8)		37.5
Balance in AOCI as of September 30, 2020	$	(45.1)	$	(52.3)		$	(38.0)	$	(135.4)

AEP

	Cash Flow Hedges					Pension
Nine Months Ended September 30, 2021	Commodity		Interest Rate			and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2020	$	(60.6)	$	(47.5)		$	23.0	$	(85.1)
Change in Fair Value Recognized in AOCI	534.5		17.6		(a)	—		552.1
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (b)	0.7		—			—		0.7
Purchased Electricity for Resale (b)	(241.2)		—			—		(241.2)
Interest Expense (b)	—		4.8			—		4.8
Amortization of Prior Service Cost (Credit)	—		—			(14.5)		(14.5)
Amortization of Actuarial (Gains) Losses	—		—			6.8		6.8
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(240.5)		4.8			(7.7)		(243.4)
Income Tax (Expense) Benefit	(50.5)		1.0			(1.6)		(51.1)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(190.0)		3.8			(6.1)		(192.3)
Net Current Period Other Comprehensive Income (Loss)	344.5		21.4			(6.1)		359.8
Balance in AOCI as of September 30, 2021	$	283.9	$	(26.1)		$	16.9	$	274.7

	Cash Flow Hedges					Pension
Nine Months Ended September 30, 2020	Commodity		Interest Rate			and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2019	$	(103.5)	$	(11.5)		$	(32.7)	$	(147.7)
Change in Fair Value Recognized in AOCI	(48.6)		(43.6)		(a)	—		(92.2)
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (b)	(0.3)		—			—		(0.3)
Purchased Electricity for Resale (b)	135.7		—			—		135.7
Interest Expense (b)	—		3.6			—		3.6
Amortization of Prior Service Cost (Credit)	—		—			(14.4)		(14.4)
Amortization of Actuarial (Gains) Losses	—		—			7.7		7.7
Reclassifications from AOCI, before Income Tax (Expense) Benefit	135.4		3.6			(6.7)		132.3
Income Tax (Expense) Benefit	28.4		0.8			(1.4)		27.8
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	107.0		2.8			(5.3)		104.5
Net Current Period Other Comprehensive Income (Loss)	58.4		(40.8)			(5.3)		12.3
Balance in AOCI as of September 30, 2020	$	(45.1)	$	(52.3)		$	(38.0)	$	(135.4)

AEP Texas

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2021		$	(1.8)	$	(6.5)	$	(8.3)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.4		—		0.4
Amortization of Prior Service Cost (Credit)		—		(0.1)		(0.1)
Amortization of Actuarial (Gains) Losses		—		0.1		0.1
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.4		—		0.4
Income Tax (Expense) Benefit		0.1		—		0.1
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.3		—		0.3
Net Current Period Other Comprehensive Income (Loss)		0.3		—		0.3
Balance in AOCI as of September 30, 2021		$	(1.5)	$	(6.5)	$	(8.0)

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2020		$	(2.9)	$	(9.3)	$	(12.2)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.4		—		0.4
Amortization of Prior Service Cost (Credit)		—		(0.1)		(0.1)
Amortization of Actuarial (Gains) Losses		—		0.1		0.1
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.4		—		0.4
Income Tax (Expense) Benefit		0.1		—		0.1
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.3		—		0.3
Net Current Period Other Comprehensive Income (Loss)		0.3		—		0.3
Balance in AOCI as of September 30, 2020		$	(2.6)	$	(9.3)	$	(11.9)

AEP Texas

		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2020		$	(2.3)	$	(6.6)	$	(8.9)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.0		—		1.0
Amortization of Prior Service Cost (Credit)		—		(0.1)		(0.1)
Amortization of Actuarial (Gains) Losses		—		0.2		0.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.0		0.1		1.1
Income Tax (Expense) Benefit		0.2		—		0.2
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.8		0.1		0.9
Net Current Period Other Comprehensive Income (Loss)		0.8		0.1		0.9
Balance in AOCI as of September 30, 2021		$	(1.5)	$	(6.5)	$	(8.0)

		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2019		$	(3.4)	$	(9.4)	$	(12.8)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.0		—		1.0
Amortization of Prior Service Cost (Credit)		—		(0.1)		(0.1)
Amortization of Actuarial (Gains) Losses		—		0.2		0.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.0		0.1		1.1
Income Tax (Expense) Benefit		0.2		—		0.2
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.8		0.1		0.9
Net Current Period Other Comprehensive Income (Loss)		0.8		0.1		0.9
Balance in AOCI as of September 30, 2020		$	(2.6)	$	(9.3)	$	(11.9)

APCo

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2021		$	8.0	$	5.9	$	13.9
Change in Fair Value Recognized in AOCI		0.2		—		0.2
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(0.6)		—		(0.6)
Amortization of Prior Service Cost (Credit)		—		(1.2)		(1.2)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(0.6)		(1.2)		(1.8)
Income Tax (Expense) Benefit		(0.1)		(0.2)		(0.3)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.5)		(1.0)		(1.5)
Net Current Period Other Comprehensive Income (Loss)		(0.3)		(1.0)		(1.3)
Balance in AOCI as of September 30, 2021		$	7.7	$	4.9	$	12.6

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2020		$	(4.1)	$	2.2	$	(1.9)
Change in Fair Value Recognized in AOCI		0.7		—		0.7
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(0.2)		—		(0.2)
Amortization of Prior Service Cost (Credit)		—		(1.3)		(1.3)
Amortization of Actuarial (Gains) Losses		—		0.1		0.1
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(0.2)		(1.2)		(1.4)
Income Tax (Expense) Benefit		(0.1)		(0.3)		(0.4)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.1)		(0.9)		(1.0)
Net Current Period Other Comprehensive Income (Loss)		0.6		(0.9)		(0.3)
Balance in AOCI as of September 30, 2020		$	(3.5)	$	1.3	$	(2.2)

APCo
		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2020		$	(0.8)	$	8.0	$	7.2
Change in Fair Value Recognized in AOCI		9.3		—		9.3
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(1.0)		—		(1.0)
Amortization of Prior Service Cost (Credit)		—		(3.9)		(3.9)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(1.0)		(3.9)		(4.9)
Income Tax (Expense) Benefit		(0.2)		(0.8)		(1.0)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.8)		(3.1)		(3.9)
Net Current Period Other Comprehensive Income (Loss)		8.5		(3.1)		5.4
Balance in AOCI as of September 30, 2021		$	7.7	$	4.9	$	12.6

		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2019		$	0.9	$	4.1	$	5.0
Change in Fair Value Recognized in AOCI		(3.8)		—		(3.8)
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(0.8)		—		(0.8)
Amortization of Prior Service Cost (Credit)		—		(4.0)		(4.0)
Amortization of Actuarial (Gains) Losses		—		0.4		0.4
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(0.8)		(3.6)		(4.4)
Income Tax (Expense) Benefit		(0.2)		(0.8)		(1.0)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.6)		(2.8)		(3.4)
Net Current Period Other Comprehensive Income (Loss)		(4.4)		(2.8)		(7.2)
Balance in AOCI as of September 30, 2020		$	(3.5)	$	1.3	$	(2.2)

I&M
		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2021		$	(7.4)	$	1.2	$	(6.2)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.5		—		0.5
Amortization of Prior Service Cost (Credit)		—		(0.2)		(0.2)
Amortization of Actuarial (Gains) Losses		—		0.2		0.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.5		—		0.5
Income Tax (Expense) Benefit		0.1		—		0.1
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.4		—		0.4
Net Current Period Other Comprehensive Income (Loss)		0.4		—		0.4
Balance in AOCI as of September 30, 2021		$	(7.0)	$	1.2	$	(5.8)

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2020		$	(9.1)	$	(1.7)	$	(10.8)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.5		—		0.5
Amortization of Prior Service Cost (Credit)		—		(0.3)		(0.3)
Amortization of Actuarial (Gains) Losses		—		0.2		0.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.5		(0.1)		0.4
Income Tax (Expense) Benefit		0.1		—		0.1
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.4		(0.1)		0.3
Net Current Period Other Comprehensive Income (Loss)		0.4		(0.1)		0.3
Balance in AOCI as of September 30, 2020		$	(8.7)	$	(1.8)	$	(10.5)

I&M
		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2020		$	(8.3)	$	1.3	$	(7.0)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.6		—		1.6
Amortization of Prior Service Cost (Credit)		—		(0.6)		(0.6)
Amortization of Actuarial (Gains) Losses		—		0.5		0.5
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.6		(0.1)		1.5
Income Tax (Expense) Benefit		0.3		—		0.3
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		1.3		(0.1)		1.2
Net Current Period Other Comprehensive Income (Loss)		1.3		(0.1)		1.2
Balance in AOCI as of September 30, 2021		$	(7.0)	$	1.2	$	(5.8)

		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2019		$	(9.9)	$	(1.7)	$	(11.6)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.5		—		1.5
Amortization of Prior Service Cost (Credit)		—		(0.6)		(0.6)
Amortization of Actuarial (Gains) Losses		—		0.5		0.5
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.5		(0.1)		1.4
Income Tax (Expense) Benefit		0.3		—		0.3
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		1.2		(0.1)		1.1
Net Current Period Other Comprehensive Income (Loss)		1.2		(0.1)		1.1
Balance in AOCI as of September 30, 2020		$	(8.7)	$	(1.8)	$	(10.5)

PSO
		Cash Flow Hedge –
Three Months Ended September 30, 2021		Interest Rate
	(in millions)
Balance in AOCI as of June 30, 2021		$	—
Change in Fair Value Recognized in AOCI		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		—
Reclassifications from AOCI, before Income Tax (Expense) Benefit		—
Income Tax (Expense) Benefit		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		—
Net Current Period Other Comprehensive Income (Loss)		—
Balance in AOCI as of September 30, 2021		$	—

		Cash Flow Hedge –
Three Months Ended September 30, 2020		Interest Rate
	(in millions)
Balance in AOCI as of June 30, 2020		$	0.6
Change in Fair Value Recognized in AOCI		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(0.3)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(0.3)
Income Tax (Expense) Benefit		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.3)
Net Current Period Other Comprehensive Income (Loss)		(0.3)
Balance in AOCI as of September 30, 2020		$	0.3

		Cash Flow Hedge –
Nine Months Ended September 30, 2021		Interest Rate
	(in millions)
Balance in AOCI as of December 31, 2020		$	0.1
Change in Fair Value Recognized in AOCI		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(0.1)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(0.1)
Income Tax (Expense) Benefit		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.1)
Net Current Period Other Comprehensive Income (Loss)		(0.1)
Balance in AOCI as of September 30, 2021		$	—

		Cash Flow Hedge –
Nine Months Ended September 30, 2020		Interest Rate
	(in millions)
Balance in AOCI as of December 31, 2019		$	1.1
Change in Fair Value Recognized in AOCI		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		(1.0)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		(1.0)
Income Tax (Expense) Benefit		(0.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		(0.8)
Net Current Period Other Comprehensive Income (Loss)		(0.8)
Balance in AOCI as of September 30, 2020		$	0.3

SWEPCo
		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2021		$	0.5	$	1.4	$	1.9
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.4		—		0.4
Amortization of Prior Service Cost (Credit)		—		(0.5)		(0.5)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.4		(0.5)		(0.1)
Income Tax (Expense) Benefit		0.1		(0.1)		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.3		(0.4)		(0.1)
Net Current Period Other Comprehensive Income (Loss)		0.3		(0.4)		(0.1)
Balance in AOCI as of September 30, 2021		$	0.8	$	1.0	$	1.8

		Cash Flow Hedge –		Pension
Three Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2020		$	(1.1)	$	(0.2)	$	(1.3)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		0.5		—		0.5
Amortization of Prior Service Cost (Credit)		—		(0.5)		(0.5)
Amortization of Actuarial (Gains) Losses		—		—		—
Reclassifications from AOCI, before Income Tax (Expense) Benefit		0.5		(0.5)		—
Income Tax (Expense) Benefit		0.1		(0.1)		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		0.4		(0.4)		—
Net Current Period Other Comprehensive Income (Loss)		0.4		(0.4)		—
Balance in AOCI as of September 30, 2020		$	(0.7)	$	(0.6)	$	(1.3)

SWEPCo
		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2021		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2020		$	(0.3)	$	2.2	$	1.9
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.4		—		1.4
Amortization of Prior Service Cost (Credit)		—		(1.5)		(1.5)
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.4		(1.5)		(0.1)
Income Tax (Expense) Benefit		0.3		(0.3)		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		1.1		(1.2)		(0.1)
Net Current Period Other Comprehensive Income (Loss)		1.1		(1.2)		(0.1)
Balance in AOCI as of September 30, 2021		$	0.8	$	1.0	$	1.8

		Cash Flow Hedge –		Pension
Nine Months Ended September 30, 2020		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2019		$	(1.8)	$	0.5	$	(1.3)
Change in Fair Value Recognized in AOCI		—		—		—
Amount of (Gain) Loss Reclassified from AOCI
Interest Expense (b)		1.4		—		1.4
Amortization of Prior Service Cost (Credit)		—		(1.5)		(1.5)
Amortization of Actuarial (Gains) Losses		—		0.1		0.1
Reclassifications from AOCI, before Income Tax (Expense) Benefit		1.4		(1.4)		—
Income Tax (Expense) Benefit		0.3		(0.3)		—
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit		1.1		(1.1)		—
Net Current Period Other Comprehensive Income (Loss)		1.1		(1.1)		—
Balance in AOCI as of September 30, 2020		$	(0.7)	$	(0.6)	$	(1.3)

(a)The change in fair value includes $(1) million and $(1) million, respectively, for the three months ended September 30, 2021 and 2020 and $(5) million and $6 million, respectively, for the nine months ended September 30, 2021 and 2020 related to AEP's investment in joint venture wind farms acquired as part of the purchase of Sempra Renewables LLC.

(b)Amounts reclassified to the referenced line item on the statements of income.