FINANCING ACTIVITIES - Schedule of Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits (Details) - Utility $ in Millions	6 Months Ended
Jun. 30, 2025 USD ($)
AEP Texas
Short-Term Debt [Line Items]
Maximum Borrowings	$ 468.4
Maximum Loans	112.8
Average Borrowings	182.7
Average Loans	62.5
Authorized Short-term Borrowing Limit	600.0
AEP Texas \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	(109.5)
AEPTCo
Short-Term Debt [Line Items]
Maximum Borrowings	403.6
Maximum Loans	312.2
Average Borrowings	192.0
Average Loans	39.8
Authorized Short-term Borrowing Limit	820.0
AEPTCo \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	32.7
APCo
Short-Term Debt [Line Items]
Maximum Borrowings	263.5
Maximum Loans	242.1
Average Borrowings	141.3
Average Loans	30.0
Authorized Short-term Borrowing Limit	750.0
APCo \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	(154.8)
I&M
Short-Term Debt [Line Items]
Maximum Borrowings	145.2
Maximum Loans	19.3
Average Borrowings	77.2
Average Loans	6.1
Authorized Short-term Borrowing Limit	500.0
I&M \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	(25.7)
OPCo
Short-Term Debt [Line Items]
Maximum Borrowings	270.9
Maximum Loans	165.9
Average Borrowings	71.6
Average Loans	81.7
Authorized Short-term Borrowing Limit	600.0
OPCo \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	(203.0)
PSO
Short-Term Debt [Line Items]
Maximum Borrowings	505.1
Maximum Loans	391.5
Average Borrowings	204.1
Average Loans	167.0
Authorized Short-term Borrowing Limit	750.0
PSO \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	(319.7)
SWEPCo
Short-Term Debt [Line Items]
Maximum Borrowings	471.9
Maximum Loans	76.3
Average Borrowings	285.9
Average Loans	10.2
Authorized Short-term Borrowing Limit	750.0
SWEPCo \| Related Party
Short-Term Debt [Line Items]
Net Loans to (Borrowings from)	$ 76.3

Authorized Short-term Borrowing Limit by regulatory orders.

No definition available.

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- Definition

Average Borrowings from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.

+ References

No definition available.

+ Details

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- Definition

Average Loans to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.

+ References

No definition available.

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- Definition

Maximum Borrowings from a Money Pool at anytime during the period. The Money Pool represents a centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.

+ References

No definition available.

+ Details

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- Definition

Maximum Loans to a Money Pool at anytime during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.

+ References

No definition available.

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- Definition

Net Loans to (Borrowings from) the Utility Money

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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