FINANCING ACTIVITIES - Schedule of Customer Accounts Receivable Managed Portfolio (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Debt Disclosure [Abstract]
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$ 1,245	$ 1,230
Short-term – Securitized Debt of Receivables	900	900
Delinquent Securitized Accounts Receivable	80	66
Bad Debt Reserves Related to Securitization	43	42
Unbilled Receivables Related to Securitization	$ 313	$ 368

Accounts receivables that have been pledged as collateral less uncollectible accounts as of the balance sheet date.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

A valuation allowance for securitized receivables that are expected to be uncollectible.

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
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Period Type:	instant

- Definition

The amount of revenue for work performed for which billing has not occurred related to securitization of accounts receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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- Definition

This is the principal amount of loans (across all types of loans) that are overdue in payment by a set number of days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

+ Details

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