VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2024

Variable Interest Entities [Abstract]

Consolidated Assets And Liabilities Of Variable Interest Entities

The balances below represent the assets and liabilities of AEP’s consolidated VIEs. These balances include intercompany transactions that are eliminated upon consolidation.

December 31, 2024
	Consolidated VIEs
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding			SWEPCo Storm Recovery Funding		AEP Credit		Protected Cell of EIS		Transource Energy
	(in millions)
ASSETS
Current Assets	$	6.0	$	79.3	$	21.3		$	14.2		$	3.4	$	1,118.3	$	218.5	$	40.2
Net Property, Plant and Equipment	—		132.3		—			—			—		—		—		598.3
Other Noncurrent Assets	110.8		63.6		121.9		(a)	109.6		(b)	331.4		10.5		—		3.5
Total Assets	$	116.8	$	275.2	$	143.2		$	123.8		$	334.8	$	1,128.8	$	218.5	$	642.0
LIABILITIES AND EQUITY
Current Liabilities	$	20.1	$	79.2	$	30.7		$	30.5		$	24.4	$	1,068.8	$	54.7	$	57.2
Noncurrent Liabilities	96.3		196.0		111.2			91.4			308.7		1.0		96.0		274.3
Equity	0.4		—		1.3			1.9			1.7		59.0		67.8		310.5
Total Liabilities and Equity	$	116.8	$	275.2	$	143.2		$	123.8		$	334.8	$	1,128.8	$	218.5	$	642.0

(a)Includes an intercompany item eliminated in consolidation of $5 million.

(b)Includes an intercompany item eliminated in consolidation of $1 million.

December 31, 2023
	Consolidated VIEs
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding			AEP Credit		Protected Cell of EIS		Transource Energy
	(in millions)
ASSETS
Current Assets	$	4.2	$	81.9	$	25.5		$	27.5		$	13.3		$	1,208.8	$	205.3	$	36.9
Net Property, Plant and Equipment	—		153.8		—			—			—			—		—		533.4
Other Noncurrent Assets	150.7		81.7		71.4		(a)	145.6		(b)	138.2		(c)	9.6		—		5.1
Total Assets	$	154.9	$	317.4	$	96.9		$	173.1		$	151.5		$	1,218.4	$	205.3	$	575.4
LIABILITIES AND EQUITY
Current Liabilities	$	19.9	$	81.7	$	75.5		$	36.8		$	29.9		$	1,155.0	$	49.2	$	45.3
Noncurrent Liabilities	134.8		235.7		17.0			135.1			119.7			0.9		91.7		241.5
Equity	0.2		—		4.4			1.2			1.9			62.5		64.4		288.6
Total Liabilities and Equity	$	154.9	$	317.4	$	96.9		$	173.1		$	151.5		$	1,218.4	$	205.3	$	575.4

(a)Includes an intercompany item eliminated in consolidation of $8 million.

(b)Includes an intercompany item eliminated in consolidation of $6 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

Billings from Significant Variable Interest

Total AEPSC billings to the Registrant Subsidiaries were as follows:

	Years Ended December 31,
Company	2024		2023		2022
	(in millions)
AEP Texas	$	242.6	$	228.5	$	236.8
AEPTCo	289.7		269.9		286.6
APCo	335.3		324.9		347.5
I&M	187.6		178.4		192.4
OPCo	283.4		269.5		272.5
PSO	157.4		138.6		142.3
SWEPCo	194.4		185.1		192.5

Carrying Amount and Classification of Variable Interest in Accounts Payable

The carrying amount and classification of variable interest in AEPSC’s accounts payable were as follows:

	December 31,
	2024				2023
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in millions)
AEP Texas	$	26.1	$	26.1	$	15.1	$	15.1
AEPTCo	29.3		29.3		17.9		17.9
APCo	36.4		36.4		21.1		21.1
I&M	25.1		25.1		14.3		14.3
OPCo	34.5		34.5		19.0		19.0
PSO	19.2		19.2		10.6		10.6
SWEPCo	22.0		22.0		12.7		12.7

SWEPCo's Investment In DHLC

SWEPCo’s investment in DHLC was:

	December 31,
	2024				2023
	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in millions)
Capital Contribution from SWEPCo	$	7.6	$	7.6	$	7.6	$	7.6
Retained Earnings	0.3		0.3		0.4		0.4
SWEPCo’s Share of Obligations	—		15.6		—		19.2
Total Investment in DHLC	$	7.9	$	23.5	$	8.0	$	27.2

AEP's Investment In OVEC

AEP’s investment in OVEC was:

	December 31,
	2024				2023
	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in millions)
Capital Contribution from AEP	$	4.4	$	4.4	$	4.4	$	4.4
AEP’s Share of OVEC Debt (a)	—		433.2		—		465.3
Total Investment in OVEC	$	4.4	$	437.6	$	4.4	$	469.7

(a)Based on the Registrants’ power participation ratios, APCo, I&M and OPCo’s share of OVEC debt was $156 million, $78 million and $199 million as of December 31, 2024, respectively, and $168 million, $84 million and $213 million as of December 31, 2023, respectively.

Purchased Power from OVEC

Power purchased by the Registrant Subsidiaries from OVEC is included in Purchased Electricity, Fuel and Other Consumables Used for Electric Generation and Purchased Electricity for Resale on the statements of income and is shown in the table below:

	Years Ended December 31,
Company	2024		2023		2022
	(in millions)
APCo	$	133.6	$	121.8	$	119.3
I&M	66.8		60.9		59.7
OPCo	169.7		154.7		151.8