Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2023

Charitable Contribution to AEP Foundation

	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Contributions to AEP Foundation	$	75.0	$	9.9	$	11.1	$	12.5	$	11.0	$	8.1	$	5.8	$	8.8

Barging, Urea Transloading and Other Services

	Years Ended December 31,
Company	2023		2022		2021
	(in millions)
AEGCo	$	9.3	$	11.3	$	7.6
APCo	39.2		36.1		40.1
KPCo	—		2.0		3.1
WPCo	10.6		4.7		3.2

AEP Wind Holdings PPAs

	Years Ended December 31,
Company	2023		2022		2021
	(in millions)
I&M	$	8.0	$	11.8	$	9.9
OPCo	16.1		23.6		19.6
SWEPCo	—		13.7		14.5

Transmission Service Charges

	Years Ended December 31,
Company	2023		2022		2021
	(in millions)
AEP Texas	$	28.7	$	28.5	$	28.0
APCo	365.1		345.1		302.0
I&M	226.2		220.8		186.7
OPCo	665.3		608.2		508.9
PSO	100.1		110.8		94.7
SWEPCo	49.2		62.1		56.2

Affiliated Revenues

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2023
Direct Sales to East Affiliates	$	—	$	—	$	158.7	$	—	$	—	$	—	$	—
Transmission Revenues	—		1,304.0		70.9		(11.1)		3.2		—		45.3
Barging, Urea Transloading and Other Transportation Services	—		—		—		59.0		—		—		—
Other Revenues	4.9		13.8		9.7		9.9		27.9		1.2		1.5
Total Affiliated Revenues	$	4.9	$	1,317.8	$	239.3	$	57.8	$	31.1	$	1.2	$	46.8

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2022
Direct Sales to East Affiliates	$	—	$	—	$	169.7	$	—	$	—	$	—	$	—
Direct Sales to West Affiliates	—		—		—		—		—		—		1.3
Transmission Revenues	—		1,276.4		77.5		7.7		(3.6)		—		51.5
Barging, Urea Transloading and Other Transportation Services	—		—		—		54.1		—		—		—
Other Revenues	3.5		7.4		8.9		7.8		22.4		2.9		1.1
Total Affiliated Revenues	$	3.5	$	1,283.8	$	256.1	$	69.6	$	18.8	$	2.9	$	53.9

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2021
Direct Sales to East Affiliates	$	—	$	—	$	128.6	$	—	$	—	$	—	$	—
Transmission Revenues	—		1,136.1		60.3		(2.5)		(1.1)		—		39.6
Barging, Urea Transloading and Other Transportation Services	—		—		—		54.0		—		—		—
Other Revenues	3.9		17.8		9.0		6.3		25.9		4.2		1.4
Total Affiliated Revenues	$	3.9	$	1,153.9	$	197.9	$	57.8	$	24.8	$	4.2	$	41.0