ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

The following tables provide a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the balance sheets that sum to the total of the same amounts shown on the statement of cash flows:

	AEP				AEP Texas				APCo				SWEPCo
	Year Ended December 31,
	2024		2023		2024		2023		2024		2023		2024		2023
	(in millions)
Cash and Cash Equivalents	$	202.9	$	330.1	$	0.1	$	0.1	$	3.9	$	5.0	$	1.2	$	2.4
Restricted Cash	43.1		48.9		23.5		34.0		16.2		14.9		3.4		—
Total Cash, Cash Equivalents and Restricted Cash	$	246.0	$	379.0	$	23.6	$	34.1	$	20.1	$	19.9	$	4.6	$	2.4

Restrictions on Cash and Cash Equivalents

The following tables provide a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the balance sheets that sum to the total of the same amounts shown on the statement of cash flows:

	AEP				AEP Texas				APCo				SWEPCo
	Year Ended December 31,
	2024		2023		2024		2023		2024		2023		2024		2023
	(in millions)
Cash and Cash Equivalents	$	202.9	$	330.1	$	0.1	$	0.1	$	3.9	$	5.0	$	1.2	$	2.4
Restricted Cash	43.1		48.9		23.5		34.0		16.2		14.9		3.4		—
Total Cash, Cash Equivalents and Restricted Cash	$	246.0	$	379.0	$	23.6	$	34.1	$	20.1	$	19.9	$	4.6	$	2.4

Significant Customers

AEP Texas had significant customers which account for the following percentages of Total Revenues for the years ended December 31 and Accounts Receivable – Customers as of December 31:

Significant Customers of AEP Texas:
NRG Energy and TXU Energy	2024		2023		2022
Percentage of Total Revenues	40	%	41	%	45	%
Percentage of Accounts Receivable – Customers	37	%	34	%	42	%

AEPTCo had significant transactions with AEP Subsidiaries which on a combined basis account for the following percentages of Total Revenues for the years ended December 31 and Total Accounts Receivable as of December 31:

Significant Customers of AEPTCo:
AEP Subsidiaries	2024		2023		2022
Percentage of Total Revenues	80	%	79	%	79	%
Percentage of Total Accounts Receivable	69	%	60	%	72	%

Defined Benefit Plan, Plan Assets, Allocation

The current target asset allocations are as follows:

Pension Plan Assets	Target
Equity	35	%
Fixed Income	49	%
Other Investments	15	%
Cash and Cash Equivalents	1	%
OPEB Plans Assets	Target
Equity	67	%
Fixed Income	32	%
Cash and Cash Equivalents	1	%

Schedule of Earnings Per Share, Basic and Diluted

The following table presents AEP’s basic and diluted EPS calculations included on the statements of income:

	Years Ended December 31,
	2024				2023				2022
	(in millions, except per-share data)
			$/share				$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	2,967.1			$	2,208.1			$	2,307.2
Weighted-Average Number of Basic AEP Common Shares Outstanding	530.1		$	5.60	518.9		$	4.26	511.8		$	4.51
Weighted-Average Dilutive Effect of Stock-Based Awards	1.2		(0.02)		1.3		(0.02)		1.7		(0.02)
Weighted-Average Number of Diluted AEP Common Shares Outstanding	531.3		$	5.58	520.2		$	4.24	513.5		$	4.49

Supplementary Income Statement Information

The following tables provide the components of Depreciation and Amortization for the years ended December 31, 2024, 2023 and 2022:

2024
Depreciation and Amortization	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Depreciation and Amortization of Property, Plant and Equipment	$	3,148.6	$	405.9	$	430.9	$	600.4	$	456.2	$	386.0	$	263.1	$	375.4
Amortization of Certain Securitized Assets	91.3		91.3		—		—		—		—		—		—
Amortization of Regulatory Assets and Liabilities	50.0		(3.7)		—		2.0		24.9		—		9.1		13.9
Total Depreciation and Amortization	$	3,289.9	$	493.5	$	430.9	$	602.4	$	481.1	$	386.0	$	272.2	$	389.3

2023
Depreciation and Amortization	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Depreciation and Amortization of Property, Plant and Equipment	$	2,927.5	$	380.0	$	393.8	$	571.1	$	439.8	$	315.8	$	240.3	$	323.4
Amortization of Certain Securitized Assets	91.9		91.9		—		—		—		—		—		—
Amortization of Regulatory Assets and Liabilities	71.0		(3.4)		—		0.8		30.2		0.4		15.2		19.4
Total Depreciation and Amortization	$	3,090.4	$	468.5	$	393.8	$	571.9	$	470.0	$	316.2	$	255.5	$	342.8

2022
Depreciation and Amortization	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Depreciation and Amortization of Property, Plant and Equipment	$	3,072.8	$	363.5	$	346.2	$	576.1	$	511.9	$	293.1	$	226.2	$	319.3
Amortization of Certain Securitized Assets	93.3		93.3		—		—		—		—		—		—
Amortization of Regulatory Assets and Liabilities	36.7		(4.4)		—		(0.2)		15.3		1.2		3.9		5.5
Total Depreciation and Amortization	$	3,202.8	$	452.4	$	346.2	$	575.9	$	527.2	$	294.3	$	230.1	$	324.8

Supplementary Cash Flow Information

	Years Ended December 31,
Cash Flow Information	2024		2023		2022
	(in millions)
Cash Paid (Received) for:
Interest, Net of Capitalized Amounts	$	1,837.8	$	1,673.5	$	1,286.3
Income Taxes	133.4		78.4		116.8
Sale of Transferable Tax Credits	(202.0)		(102.0)		—
Noncash Investing and Financing Activities:
Acquisitions Under Finance Leases	29.5		48.7		31.8
Construction Expenditures Included in Current Liabilities as of December 31,	1,312.0		842.4		1,258.9
Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31,	23.5		24.2		—
Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio	—		74.7		—