Leases (Details) - USD ($) $ in Thousands		1 Months Ended		12 Months Ended
		Feb. 23, 2023	Jan. 31, 2022	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Lease Rental Costs
Operating Lease, Cost				$ 157,500		$ 275,300	$ 279,600
Finance Lease Right-of-Use Asset Amortization				205,500		74,700	61,900
Interest Expense on Finance Leases				13,400		14,400	15,400
Total Lease Rental Costs	[1]			$ 376,400		$ 364,400	356,900
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				12 years 8 months 8 days		10 years 4 months 20 days
Weighted Average Remaining Lease Term, Finance Leases				4 years 7 months 9 days		2 years 11 months 12 days
Weighted Average Discount Rate, Operating Leases				3.54%		3.35%
Weighted Average Discount Rate, Finance Leases				5.76%		3.26%
Operating Cash Flows Used for Operating Leases				$ 155,100		$ 279,900
Operating Cash Flows Used for Finance Leases				13,600		14,300
Financing Cash Flows Used for Finance Leases				309,500		64,000	61,700
Non-cash Acquisitions Under Operating Leases				191,400		117,000
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				24,597,700		23,088,100
Other Property, Plant and Equipment				6,142,100		5,682,900
Total Property, Plant and Equipment				93,794,000		86,806,400
Accumulated Amortization				22,511,100		20,805,100
Net Property, Plant and Equipment Under Finance Leases	[2]			212,400		490,200
Other Liabilities, Noncurrent				599,100		601,300
Finance Lease Liability Due Within One Year				1,261,100		1,369,200
Total Obligations Under Finance Leases	[3]			225,400	[4]	500,700
Operating Lease Asset and Related Obligations
Operating Lease Assets				645,000		578,300
Operating Lease Noncurrent Liability				552,100		492,800
Operating Lease Liability Due Within One Year				113,400		97,600
Estimated Present Value of Future Minimum Lease Payments on Operating Leases	[5]			665,500	[6]	590,400
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				67,800
Year 2				71,400
Year 3				40,900
Year 4				24,900
Year 5				19,200
Finance Leases, Later Years				32,600
Finance Leases, Total Future Minimum Lease Payments				256,800
Imputed Interest on Finance Leases				31,400
Total Obligations Under Finance Leases	[3]			225,400	[4]	500,700
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				138,500
Year 2				125,700
Year 3				86,600
Year 4				75,500
Year 5				65,600
Operating Leases, Later Years				352,000
Operating Leases, Total Future Minimum Lease Payments				843,900
Imputed Interest on Operating Leases				178,400
Estimated Present Value of Future Minimum Lease Payments on Operating Leases	[5]			665,500	[6]	590,400
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				46,000
Leases (Textuals)
Assets Held for Sale				2,823,500		2,919,700
Liabilities Held for Sale				1,955,700		1,880,900
Repayments of Long-term Debt				2,345,400		2,989,300	1,339,800
Liabilities Held for Sale				1,955,700		1,880,900
Kentucky Power Co [Member]
Leases (Textuals)
Liabilities Held for Sale				369		3,000
Liabilities Held for Sale				369		3,000
Kentucky Power Co [Member]
Leases (Textuals)
Assets Held for Sale				369		3,000
Kentucky Power Co [Member]
Leases (Textuals)
Liabilities Held for Sale				578		11,000
Liabilities Held for Sale				578		11,000
Kentucky Power Co [Member]
Leases (Textuals)
Assets Held for Sale				528		11,000
Boat and Barge Leases [Member]
Leases (Textuals)
Maximum Potential Lease Payments, AEPRO Barge and Boat Leases				27,000
Guarantor Obligations, Current Carrying Value				2,000
Guarantee Obligations Current Carrying Value Other Liabilities Current				1,000
Guarantee Obligations Current Carrying Value Other Liabilities Noncurrent				1,000
Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				120,500		388,800
Other Property, Plant and Equipment				321,200		323,800
Total Property, Plant and Equipment				441,700		712,600
Accumulated Amortization				229,300		222,400
Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				168,200		196,100
Finance Lease Liability Due Within One Year				57,200		304,600
Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets	[7]			645,000		578,300
AEP Texas Inc. [Member]
Lease Rental Costs
Operating Lease, Cost				18,400		18,400	17,400
Finance Lease Right-of-Use Asset Amortization				6,800		6,700	6,300
Interest Expense on Finance Leases				1,300		1,400	1,500
Total Lease Rental Costs	[1]			$ 26,500		$ 26,500	25,200
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				4 years 3 months 29 days		5 years 10 months 28 days
Weighted Average Remaining Lease Term, Finance Leases				5 years 4 months 20 days		5 years 6 months 3 days
Weighted Average Discount Rate, Operating Leases				4.15%		3.53%
Weighted Average Discount Rate, Finance Leases				4.75%		4.31%
Operating Cash Flows Used for Operating Leases				$ 18,300		$ 18,000
Operating Cash Flows Used for Finance Leases				1,300		1,400
Financing Cash Flows Used for Finance Leases				6,800		6,700	6,300
Non-cash Acquisitions Under Operating Leases				36,700		4,400
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Property, Plant and Equipment				1,022,800		961,100
Total Property, Plant and Equipment				13,442,300		12,279,500
Accumulated Amortization				1,760,700		1,644,100
Net Property, Plant and Equipment Under Finance Leases				30,100		30,800
Other Liabilities, Noncurrent				93,200		73,800
Finance Lease Liability Due Within One Year				130,700		78,000
Total Obligations Under Finance Leases				30,100		30,800
Operating Lease Asset and Related Obligations
Operating Lease Noncurrent Liability				67,800		61,300
Operating Lease Liability Due Within One Year				28,600		14,000
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				96,400		75,300
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				8,300
Year 2				7,200
Year 3				5,500
Year 4				4,400
Year 5				3,500
Finance Leases, Later Years				5,500
Finance Leases, Total Future Minimum Lease Payments				34,400
Imputed Interest on Finance Leases				4,300
Total Obligations Under Finance Leases				30,100		30,800
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				32,300
Year 2				29,700
Year 3				13,100
Year 4				10,900
Year 5				8,300
Operating Leases, Later Years				11,700
Operating Leases, Total Future Minimum Lease Payments				106,000
Imputed Interest on Operating Leases				9,600
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				96,400		75,300
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				11,100
Leases (Textuals)
Repayments of Long-term Debt				716,000		88,700	392,100
AEP Texas Inc. [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				0		0
Other Property, Plant and Equipment				53,700		50,700
Total Property, Plant and Equipment				53,700		50,700
Accumulated Amortization				23,600		19,900
AEP Texas Inc. [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				23,100		24,200
Finance Lease Liability Due Within One Year				7,000		6,600
AEP Texas Inc. [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				94,700		73,600
AEP Transmission Co [Member]
Lease Rental Costs
Operating Lease, Cost				1,100		1,700	2,600
Finance Lease Right-of-Use Asset Amortization				0		0	0
Interest Expense on Finance Leases				0		0	0
Total Lease Rental Costs	[1]			$ 1,100		$ 1,700	2,600
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				2 years 18 days		2 years 11 months 12 days
Weighted Average Remaining Lease Term, Finance Leases				0 years		0 years
Weighted Average Discount Rate, Operating Leases				1.96%		0.90%
Weighted Average Discount Rate, Finance Leases				0.00%		0.00%
Operating Cash Flows Used for Operating Leases				$ 1,000		$ 1,600
Operating Cash Flows Used for Finance Leases				0		0
Financing Cash Flows Used for Finance Leases				0		0
Non-cash Acquisitions Under Operating Leases				1,700		2,100
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Property, Plant and Equipment				451,900		427,400
Total Property, Plant and Equipment				14,182,200		12,708,500
Accumulated Amortization				1,012,100		772,800
Net Property, Plant and Equipment Under Finance Leases				0		0
Other Liabilities, Noncurrent				68,300		3,200
Finance Lease Liability Due Within One Year				8,400		3,000
Total Obligations Under Finance Leases				0		0
Operating Lease Asset and Related Obligations
Operating Lease Noncurrent Liability				1,500		1,300
Operating Lease Liability Due Within One Year				1,300		900
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				2,800		2,200
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				0
Year 2				0
Year 3				0
Year 4				0
Year 5				0
Finance Leases, Later Years				0
Finance Leases, Total Future Minimum Lease Payments				0
Imputed Interest on Finance Leases				0
Total Obligations Under Finance Leases				0		0
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				1,400
Year 2				900
Year 3				400
Year 4				200
Year 5				0
Operating Leases, Later Years				0
Operating Leases, Total Future Minimum Lease Payments				2,900
Imputed Interest on Operating Leases				100
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				2,800		2,200
Leases (Textuals)
Assets Held for Sale				178,000		167,900
Liabilities Held for Sale				28,600		27,600
Repayments of Long-term Debt				104,000		50,000	0
Liabilities Held for Sale				28,600		27,600
AEP Transmission Co [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				0		0
Other Property, Plant and Equipment				0		0
Total Property, Plant and Equipment				0		0
Accumulated Amortization				0		0
AEP Transmission Co [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				0		0
Finance Lease Liability Due Within One Year				0		0
AEP Transmission Co [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				2,700		2,000
Appalachian Power Co [Member]
Lease Rental Costs
Operating Lease, Cost				17,900		19,300	19,100
Finance Lease Right-of-Use Asset Amortization				7,900		7,700	7,400
Interest Expense on Finance Leases				2,000		2,400	2,700
Total Lease Rental Costs	[1]			$ 27,800		$ 29,400	29,200
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				5 years 3 months 14 days		5 years 8 months 4 days
Weighted Average Remaining Lease Term, Finance Leases				4 years 3 months		4 years 11 months 19 days
Weighted Average Discount Rate, Operating Leases				3.61%		3.42%
Weighted Average Discount Rate, Finance Leases				7.09%		7.16%
Operating Cash Flows Used for Operating Leases				$ 17,900		$ 19,300
Operating Cash Flows Used for Finance Leases				2,000		2,400
Financing Cash Flows Used for Finance Leases				7,900		7,700	7,400
Non-cash Acquisitions Under Operating Leases				23,100		4,200
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				6,776,800		6,683,900
Other Property, Plant and Equipment				883,300		696,600
Total Property, Plant and Equipment				17,781,200		16,856,100
Accumulated Amortization				5,402,000		5,051,800
Net Property, Plant and Equipment Under Finance Leases				29,300		35,700
Other Liabilities, Noncurrent				49,600		34,600
Finance Lease Liability Due Within One Year				171,200		146,400
Total Obligations Under Finance Leases				29,300		35,700
Operating Lease Asset and Related Obligations
Operating Lease Assets				73,600		66,900
Operating Lease Noncurrent Liability				59,100		52,400
Operating Lease Liability Due Within One Year				15,000		15,100
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				74,100		67,500
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				9,600
Year 2				8,800
Year 3				7,500
Year 4				2,900
Year 5				1,800
Finance Leases, Later Years				2,800
Finance Leases, Total Future Minimum Lease Payments				33,400
Imputed Interest on Finance Leases				4,100
Total Obligations Under Finance Leases				29,300		35,700
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				17,500
Year 2				14,600
Year 3				11,800
Year 4				10,300
Year 5				9,100
Operating Leases, Later Years				19,200
Operating Leases, Total Future Minimum Lease Payments				82,500
Imputed Interest on Operating Leases				8,400
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				74,100		67,500
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				6,100
Leases (Textuals)
Repayments of Long-term Debt				230,400		393,000	140,300
Appalachian Power Co [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				41,100		42,800
Other Property, Plant and Equipment				20,100		20,400
Total Property, Plant and Equipment				61,200		63,200
Accumulated Amortization				31,900		27,500
Appalachian Power Co [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				21,600		28,100
Finance Lease Liability Due Within One Year				7,700		7,600
Appalachian Power Co [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				73,600		66,900
Indiana Michigan Power Co [Member]
Lease Rental Costs
Operating Lease, Cost				29,500		90,200	101,500
Finance Lease Right-of-Use Asset Amortization				78,700		12,900	6,500
Interest Expense on Finance Leases				3,100		3,000	3,100
Total Lease Rental Costs	[1]			$ 111,300		$ 106,100	111,100
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				5 years 9 months 14 days		5 years 10 months 13 days
Weighted Average Remaining Lease Term, Finance Leases				4 years 9 months 3 days		2 years 1 month 6 days
Weighted Average Discount Rate, Operating Leases				3.62%		3.46%
Weighted Average Discount Rate, Finance Leases				8.99%		3.02%
Operating Cash Flows Used for Operating Leases				$ 29,700		$ 92,900
Operating Cash Flows Used for Finance Leases				3,200		2,900
Financing Cash Flows Used for Finance Leases				130,700		6,800	6,500
Non-cash Acquisitions Under Operating Leases				19,100		2,600
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				5,585,100		5,531,800
Other Property, Plant and Equipment				839,300		792,900
Total Property, Plant and Equipment				11,544,300		11,210,700
Accumulated Amortization				4,132,800		3,899,800
Net Property, Plant and Equipment Under Finance Leases				33,800		160,700
Other Liabilities, Noncurrent				58,800		58,300
Finance Lease Liability Due Within One Year				98,900		123,200
Total Obligations Under Finance Leases				34,000		162,200
Operating Lease Asset and Related Obligations
Operating Lease Assets				64,300		63,500
Operating Lease Noncurrent Liability				48,900		48,900
Operating Lease Liability Due Within One Year				16,000		15,500
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				64,900		64,400
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				9,200
Year 2				12,100
Year 3				6,300
Year 4				3,900
Year 5				3,400
Finance Leases, Later Years				7,600
Finance Leases, Total Future Minimum Lease Payments				42,500
Imputed Interest on Finance Leases				8,500
Total Obligations Under Finance Leases				34,000		162,200
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				18,800
Year 2				17,700
Year 3				9,200
Year 4				8,300
Year 5				7,500
Operating Leases, Later Years				9,800
Operating Leases, Total Future Minimum Lease Payments				71,300
Imputed Interest on Operating Leases				6,400
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				64,900		64,400
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				4,400
Leases (Textuals)
Repayments of Long-term Debt				83,400		383,500	93,200
Indiana Michigan Power Co [Member] | Notes Payable, Other Payables [Member] | Subsequent Event [Member]
Leases (Textuals)
Repayments of Long-term Debt		$ 8,000	$ 8,000
Indiana Michigan Power Co [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				28,000		156,800
Other Property, Plant and Equipment				40,600		42,100
Total Property, Plant and Equipment				68,600		198,900
Accumulated Amortization				34,800		38,200
Indiana Michigan Power Co [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				27,100		31,700
Finance Lease Liability Due Within One Year				6,900		130,500
Indiana Michigan Power Co [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				64,300		63,500
Ohio Power Co [Member]
Lease Rental Costs
Operating Lease, Cost				16,900		19,000	17,100
Finance Lease Right-of-Use Asset Amortization				4,900		4,900	4,700
Interest Expense on Finance Leases				800		800	900
Total Lease Rental Costs	[1]			$ 22,600		$ 24,700	22,700
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				5 years 11 months 23 days		6 years 8 months 8 days
Weighted Average Remaining Lease Term, Finance Leases				5 years 3 months 7 days		5 years 6 months 14 days
Weighted Average Discount Rate, Operating Leases				3.73%		3.56%
Weighted Average Discount Rate, Finance Leases				4.53%		4.19%
Operating Cash Flows Used for Operating Leases				$ 17,500		$ 19,000
Operating Cash Flows Used for Finance Leases				800		800
Financing Cash Flows Used for Finance Leases				4,900		4,900	4,700
Non-cash Acquisitions Under Operating Leases				8,400		4,200
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Property, Plant and Equipment				1,051,400		992,900
Total Property, Plant and Equipment				11,174,600		10,421,300
Accumulated Amortization				2,565,300		2,458,300
Net Property, Plant and Equipment Under Finance Leases				18,900		19,300
Other Liabilities, Noncurrent				66,000		29,200
Finance Lease Liability Due Within One Year				154,200		118,100
Total Obligations Under Finance Leases				18,900		19,300
Operating Lease Asset and Related Obligations
Operating Lease Assets				73,800		81,200
Operating Lease Noncurrent Liability				60,300		68,600
Operating Lease Liability Due Within One Year				13,500		13,100
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				73,800		81,700
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				5,400
Year 2				4,600
Year 3				3,200
Year 4				2,600
Year 5				2,100
Finance Leases, Later Years				3,400
Finance Leases, Total Future Minimum Lease Payments				21,300
Imputed Interest on Finance Leases				2,400
Total Obligations Under Finance Leases				18,900		19,300
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				16,400
Year 2				14,900
Year 3				13,200
Year 4				12,000
Year 5				10,700
Operating Leases, Later Years				15,700
Operating Leases, Total Future Minimum Lease Payments				82,900
Imputed Interest on Operating Leases				9,100
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				73,800		81,700
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				7,600
Leases (Textuals)
Repayments of Long-term Debt				100		500,100	100
Ohio Power Co [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				0		0
Other Property, Plant and Equipment				32,700		32,100
Total Property, Plant and Equipment				32,700		32,100
Accumulated Amortization				13,800		12,800
Ohio Power Co [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				14,200		14,900
Finance Lease Liability Due Within One Year				4,700		4,400
Ohio Power Co [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				73,800		81,200
Public Service Co Of Oklahoma [Member]
Lease Rental Costs
Operating Lease, Cost				11,800		8,700	7,800
Finance Lease Right-of-Use Asset Amortization				3,200		3,200	3,500
Interest Expense on Finance Leases				600		600	700
Total Lease Rental Costs	[1]			$ 15,600		$ 12,500	12,000
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				23 years 10 months 24 days		20 years 10 months 20 days
Weighted Average Remaining Lease Term, Finance Leases				6 years 7 days		6 years 2 months 4 days
Weighted Average Discount Rate, Operating Leases				3.43%		3.35%
Weighted Average Discount Rate, Finance Leases				4.63%		4.23%
Operating Cash Flows Used for Operating Leases				$ 10,500		$ 8,700
Operating Cash Flows Used for Finance Leases				600		600
Financing Cash Flows Used for Finance Leases				3,200		3,200	3,500
Non-cash Acquisitions Under Operating Leases				46,000		33,400
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				2,394,800		1,802,400
Other Property, Plant and Equipment				469,300		437,000
Total Property, Plant and Equipment				7,464,200		6,508,000
Accumulated Amortization				1,837,700		1,705,200
Net Property, Plant and Equipment Under Finance Leases				15,000		15,300
Other Liabilities, Noncurrent				21,300		19,400
Finance Lease Liability Due Within One Year				101,800		66,400
Total Obligations Under Finance Leases				15,000		15,300
Operating Lease Asset and Related Obligations
Operating Lease Assets				106,100		68,900
Operating Lease Noncurrent Liability				99,300		62,200
Operating Lease Liability Due Within One Year				8,900		6,900
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				108,200		69,100
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				3,800
Year 2				3,300
Year 3				2,500
Year 4				2,200
Year 5				1,800
Finance Leases, Later Years				3,700
Finance Leases, Total Future Minimum Lease Payments				17,300
Imputed Interest on Finance Leases				2,300
Total Obligations Under Finance Leases				15,000		15,300
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				11,500
Year 2				10,700
Year 3				9,500
Year 4				8,600
Year 5				7,800
Operating Leases, Later Years				116,400
Operating Leases, Total Future Minimum Lease Payments				164,500
Imputed Interest on Operating Leases				56,300
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				108,200		69,100
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				4,800
Leases (Textuals)
Repayments of Long-term Debt				500,500		750,500	13,200
Public Service Co Of Oklahoma [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				600		600
Other Property, Plant and Equipment				25,200		23,900
Total Property, Plant and Equipment				25,800		24,500
Accumulated Amortization				10,800		9,200
Public Service Co Of Oklahoma [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				11,700		12,300
Finance Lease Liability Due Within One Year				3,300		3,000
Public Service Co Of Oklahoma [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				106,100		68,900
Southwestern Electric Power Co [Member]
Lease Rental Costs
Operating Lease, Cost				15,300		12,100	9,400
Finance Lease Right-of-Use Asset Amortization				10,800		11,000	10,900
Interest Expense on Finance Leases				2,100		2,500	2,200
Total Lease Rental Costs	[1]			$ 28,200		$ 25,600	22,500
Supplemental Information Related to Leases
Weighted-Average Remaining Lease Term, Operating Leases				23 years 6 months 18 days		20 years 2 months 26 days
Weighted Average Remaining Lease Term, Finance Leases				4 years 1 month 17 days		4 years 6 months 10 days
Weighted Average Discount Rate, Operating Leases				3.41%		3.34%
Weighted Average Discount Rate, Finance Leases				4.80%		4.68%
Operating Cash Flows Used for Operating Leases				$ 13,700		$ 11,600
Operating Cash Flows Used for Finance Leases				2,100		2,500
Financing Cash Flows Used for Finance Leases				10,800		10,900	10,900
Non-cash Acquisitions Under Operating Leases				53,600		42,900
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				5,476,200		4,734,500
Other Property, Plant and Equipment				804,400		764,000
Total Property, Plant and Equipment				11,789,500		10,570,400
Accumulated Amortization				3,527,300		3,170,300
Net Property, Plant and Equipment Under Finance Leases				29,600		42,200
Other Liabilities, Noncurrent				68,400		63,000
Finance Lease Liability Due Within One Year				172,000		154,600
Total Obligations Under Finance Leases				42,200		49,700
Operating Lease Asset and Related Obligations
Operating Lease Noncurrent Liability				120,200		77,700
Operating Lease Liability Due Within One Year				8,400		8,100
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				128,600		85,800
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				12,400
Year 2				16,500
Year 3				6,100
Year 4				2,800
Year 5				2,400
Finance Leases, Later Years				5,600
Finance Leases, Total Future Minimum Lease Payments				45,800
Imputed Interest on Finance Leases				3,600
Total Obligations Under Finance Leases				42,200		49,700
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Year 1				14,400
Year 2				12,700
Year 3				11,400
Year 4				10,200
Year 5				8,800
Operating Leases, Later Years				141,800
Operating Leases, Total Future Minimum Lease Payments				199,300
Imputed Interest on Operating Leases				70,700
Estimated Present Value of Future Minimum Lease Payments on Operating Leases				128,600		85,800
Maximum Potential Loss
Max Potential Loss on Master Lease Agreements				5,300
Leases (Textuals)
Repayments of Long-term Debt				6,200		381,200	$ 21,200
Southwestern Electric Power Co [Member] | Finance Lease Assets [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Generation				25,900		34,300
Other Property, Plant and Equipment				58,300		55,700
Total Property, Plant and Equipment				84,200		90,000
Accumulated Amortization				54,600		47,800
Southwestern Electric Power Co [Member] | Finance Lease Liabilities [Member]
Property, Plant and Equipment and Other Related Obligations Under Finance Leases
Other Liabilities, Noncurrent				31,300		38,900
Finance Lease Liability Due Within One Year				10,900		10,800
Southwestern Electric Power Co [Member] | Operating Lease Assets [Member]
Operating Lease Asset and Related Obligations
Operating Lease Assets				$ 123,400		$ 80,100

[1] Excludes variable and short-term lease costs, which were immaterial.

[2] Amount excludes $369 thousand and $3 million of Net Property, Plant and Equipment Under Finance Leases classified as Assets Held for Sale on the balance sheet for the years ended December 31, 2022 and 2021, respectively. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[3] Amount excludes $369 thousand and $3 million of Obligations Under Finance Leases classified as Liabilities Held for Sale on the balance sheet for the years ended December 31, 2022 and 2021, respectively. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[4] Amount excludes $369 thousand of Obligations Under Finance Leases classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[5] Amount excludes $578 thousand and $11 million of Obligations Under Operating Leases classified as Liabilities Held for Sale on the balance sheet for the years ended December 31, 2022 and 2021, respectively. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[6] Amount excludes $578 thousand of Obligations Under Operating Leases classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[7] Amount excludes $528 thousand and $11 million of Operating Lease Assets classified as Assets Held for Sale on the balance sheet for the years ended December 31, 2022 and 2021, respectively. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.