Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Affiliated Revenues

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2019
Direct Sales to East Affiliates	$	—	$	—	$	128.6	$	—	$	—	$	—	$	—
Direct Sales to West Affiliates	—		—		—		—		—		—		—
Auction Sales to OPCo (a)	—		—		11.4		6.7		—		—		—
Direct Sales to AEPEP	157.2		—		—		—		—		—		(0.1		)
Transmission Revenues	—		795.5		58.5		0.7		7.7		1.3		3.6
Other Revenues	3.3		11.2		6.8		3.1		19.6		4.8		1.4
Total Affiliated Revenues	$	160.5	$	806.7	$	205.3	$	10.5	$	27.3	$	6.1	$	4.9

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2018
Direct Sales to East Affiliates	$	—	$	—	$	133.2	$	0.1	$	—	$	—	$	—
Direct Sales to West Affiliates	—		—		—		—		—		—		—
Auction Sales to OPCo (a)	—		—		5.8		7.1		—		—		—
Direct Sales to AEPEP	103.6		—		—		—		—		—		—
Transmission Revenues	—		591.4		36.4		11.7		3.9		0.9		26.9
Other Revenues	1.6		7.5		6.0		3.2		17.1		4.5		1.5
Total Affiliated Revenues	$	105.2	$	598.9	$	181.4	$	22.1	$	21.0	$	5.4	$	28.4

Related Party Revenues	AEP Texas		AEPTCo		APCo		I&M			OPCo		PSO		SWEPCo
	(in millions)
Year Ended December 31, 2017
Direct Sales to East Affiliates	$	—	$	—	$	130.4	$	—		$	—	$	—	$	—
Direct Sales to West Affiliates	—		—		—		3.8			—		—		—
Auction Sales to OPCo (a)	—		—		1.0		—			—		—		—
Direct Sales to AEPEP	63.6		—		—		—			—		—		(0.2		)
Transmission Revenues	—		559.6		34.1		(4.4		)	6.2		—		24.2
Other Revenues	2.1		8.5		6.5		2.4			18.2		4.3		1.9
Total Affiliated Revenues	$	65.7	$	568.1	$	172.0	$	1.8		$	24.4	$	4.3	$	25.9

(a)

Refer to the Ohio Auctions section below for further information regarding these amounts.

Affiliated Purchases

Related Party Purchases	I&M		OPCo
	(in millions)
Year Ended December 31, 2019
Auction Purchases from AEPEP (a)	$	—	$	64.6
Auction Purchases from AEP Energy (a)	—		69.9
Auction Purchases from AEPSC (a)	—		21.5
Direct Purchases from AEGCo	214.9		—
Total Affiliated Purchases	$	214.9	$	156.0

Related Party Purchases	I&M		OPCo
	(in millions)
Year Ended December 31, 2018
Auction Purchases from AEPEP (a)	$	—	$	79.7
Auction Purchases from AEP Energy (a)	—		41.0
Auction Purchases from AEPSC (a)	—		14.6
Direct Purchases from AEGCo	237.9		—
Total Affiliated Purchases	$	237.9	$	135.3

Related Party Purchases	I&M		OPCo
	(in millions)
Year Ended December 31, 2017
Auction Purchases from AEPEP (a)	$	—	$	96.5
Auction Purchases from AEP Energy (a)	—		5.5
Auction Purchases from AEPSC (a)	—		6.5
Direct Purchases from AEGCo	223.9		—
Total Affiliated Purchases	$	223.9	$	108.5

(a) Refer to the Ohio Auctions section below for further information regarding this amount.

PJM Transmission Service Charges

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
APCo	$	222.3	$	128.3	$	158.2
I&M	143.5		91.4		103.8
OPCo	373.4		210.1		248.6

SPP Transmission Service Charges

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
PSO	$	46.9	$	65.9	$	56.0
SWEPCo	20.1		10.5		6.6

Joint License Agreement

	Years Ended December 31,
Billing Company	2019		2018		2017
	(in millions)
APCo	$	0.2	$	—	$	—
I&M	1.5		2.2		1.4
KPCo	0.3		0.2		0.2
OPCo	2.2		2.9		2.4
PSO	0.3		0.3		0.3
WPCo	0.1		—		—

Railcar Maintenance

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
I&M	$	1.3	$	1.5	$	1.3
PSO	0.8		0.7		0.5
SWEPCo	4.0		3.4		3.5

Barging, Urea Transloading and Other Services

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
AEGCo	$	14.9	$	19.9	$	15.3
AGR	—		—		0.1
APCo	38.9		35.1		37.2
KPCo	4.8		4.2		5.0
WPCo	4.8		4.2		5.0

Central Machine Shop

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
AGR	$	0.8	$	1.6	$	1.2
I&M	2.3		2.4		2.7
KPCo	1.4		1.7		1.8
PSO	1.1		0.5		1.1
SWEPCo	1.1		0.7		0.8

Related Party Sales of Property

Sales

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
AEP Texas	$	0.9	$	0.3	$	0.2
APCo	5.5		5.4		3.5
I&M	7.5		8.2		5.0
OPCo	7.0		10.7		2.9
PSO	0.8		1.0		1.5
SWEPCo	0.2		0.8		0.5

Related Party Purchases of Property

Purchases

	Years Ended December 31,
Company	2019		2018		2017
	(in millions)
AEP Texas	$	0.3	$	0.1	$	0.4
AEPTCo	10.2		18.5		9.1
APCo	6.0		0.6		0.9
I&M	0.9		2.0		3.5
OPCo	3.0		2.8		1.6
PSO	0.5		1.3		0.2
SWEPCo	0.7		0.8		0.4

Charitable Contribution to AEP Foundation [Table Text Block]

	Year Ended December 31,
Company	2019
	(in millions)
AEP	$	50.0
AEP Texas	6.2
AEPTCo	6.5
APCo	8.9
I&M	9.0
OPCo	5.4
PSO	3.4
SWEPCo	5.5