SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
REVENUES
Total Revenues	$ 19,721.3	$ 18,982.3	$ 19,639.5
EXPENSES
Other Operation	3,127.6	2,810.5	2,878.1
Depreciation and Amortization	3,289.9	3,090.4	3,202.8
TOTAL EXPENSES	15,417.7	15,426.1	16,156.8
OPERATING INCOME	4,303.6	3,556.2	3,482.7
Other Income (Expense):
Interest Expense	(1,862.8)	(1,806.9)	(1,396.1)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	2,842.9	2,208.7	2,420.4
Income Tax Expense (Benefit)	(39.2)	54.6	5.4
Equity Earnings (Loss) of Unconsolidated Subsidiaries	93.7	58.5	(109.4)
Net Current Period Other Comprehensive Income (Loss)	52.4	(139.2)	(101.1)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 3,019.5	$ 2,068.9	$ 2,206.1
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING (in shares)	530,092,672	518,903,682	511,841,946
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share)	$ 5.60	$ 4.26	$ 4.51
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING (in shares)	531,337,703	520,206,258	513,484,609
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share)	$ 5.58	$ 4.24	$ 4.49
Parent Company
REVENUES
Total Revenues	$ 5.5	$ 5.1	$ 5.1
EXPENSES
Other Operation	66.0	16.7	84.9
Loss on the Expected Sale of the Kentucky Operations	0.0	0.0	363.3
Depreciation and Amortization	0.6	0.5	0.4
Amortization of KPCo Basis Difference	(21.4)	(16.5)	0.0
TOTAL EXPENSES	45.2	0.7	448.6
OPERATING INCOME	(39.7)	4.4	(443.5)
Other Income (Expense):
Interest Income	107.9	181.0	80.3
Interest Expense	(531.8)	(526.3)	(275.5)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	(463.6)	(340.9)	(638.7)
Income Tax Expense (Benefit)	(150.5)	(80.8)	(136.3)
Equity Earnings (Loss) of Unconsolidated Subsidiaries	3,280.2	2,468.2	2,809.6
NET INCOME	2,967.1	2,208.1	2,307.2
Net Current Period Other Comprehensive Income (Loss)	52.4	(139.2)	(101.1)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 3,019.5	$ 2,068.9	$ 2,206.1
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING (in shares)	530,092,672	518,903,682	511,841,946
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share)	$ 5.60	$ 4.26	$ 4.51
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING (in shares)	531,337,703	520,206,258	513,484,609
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share)	$ 5.58	$ 4.24	$ 4.49