Income Taxes (Tables)

3 Months Ended

Mar. 31, 2021

Schedule of Effective Income Tax Rate Reconciliation

	Three Months Ended March 31, 2021
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	2.3	%	1.4	%	2.7	%	3.2	%	1.3	%	0.7	%	4.7	%	(0.8)	%
Tax Reform Excess ADIT Reversal	(9.2)	%	(7.8)	%	0.3	%	(18.0)	%	(17.9)	%	(9.7)	%	(24.7)	%	(5.9)	%
Production and Investment Tax Credits	(5.5)	%	(0.3)	%	—	%	—	%	(1.7)	%	—	%	(8.2)	%	(5.1)	%
Flow Through	0.3	%	0.3	%	0.2	%	1.6	%	(1.0)	%	1.1	%	0.6	%	(0.7)	%
AFUDC Equity	(0.9)	%	(1.4)	%	(1.7)	%	(1.1)	%	(0.2)	%	(1.1)	%	(0.5)	%	(0.4)	%
Parent Company Loss Benefit	—	%	—	%	(1.9)	%	(2.9)	%	(2.5)	%	—	%	—	%	—	%
Discrete Tax Adjustments	0.5	%	—	%	—	%	—	%	—	%	(4.0)	%	—	%	—	%
Other	0.1	%	0.1	%	0.1	%	0.1	%	—	%	0.2	%	(0.9)	%	0.1	%
Effective Income Tax Rate	8.6	%	13.3	%	20.7	%	3.9	%	(1.0)	%	8.2	%	(8.0)	%	8.2	%

	Three Months Ended March 31, 2020
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	2.5	%	1.5	%	2.9	%	3.0	%	3.2	%	0.7	%	4.6	%	2.7	%
Tax Reform Excess ADIT Reversal	(9.4)	%	(6.2)	%	0.4	%	(13.0)	%	(19.6)	%	(10.2)	%	(23.1)	%	(94.7)	%
Production and Investment Tax Credits	(4.3)	%	(0.4)	%	—	%	—	%	(1.9)	%	—	%	(1.3)	%	(0.5)	%
Flow Through	0.5	%	0.1	%	0.5	%	1.5	%	0.2	%	1.0	%	0.6	%	(1.0)	%
AFUDC Equity	(1.4)	%	(2.6)	%	(2.6)	%	(1.0)	%	(1.1)	%	(1.0)	%	(0.7)	%	(0.4)	%
Parent Company Loss Benefit	—	%	(0.2)	%	(0.9)	%	(3.3)	%	(3.9)	%	(0.1)	%	(2.2)	%	(2.4)	%
Discrete Tax Adjustments	—	%	—	%	—	%	—	%	2.7	%	—	%	—	%	—	%
Other	(0.4)	%	0.3	%	—	%	0.1	%	(0.2)	%	—	%	0.1	%	7.2	%
Effective Income Tax Rate	8.5	%	13.5	%	21.3	%	8.3	%	0.4	%	11.4	%	(1.0)	%	(68.1)	%