Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020
Current Assets
Cash and Cash Equivalents		$ 403.4		$ 392.7
Restricted Cash		48.0		45.6
Other Temporary Investments		220.4		200.8
Accounts Receivable:
Customers		720.9		613.6
Accrued Unbilled Revenues		204.4		248.7
Pledged Accounts Receivable - AEP Credit		1,038.0		1,018.4
Miscellaneous		33.9		33.1
Allowance for Uncollectible Accounts		(55.6)		(71.1)
Total Accounts Receivable		1,941.6		1,842.7
Fuel		307.9		629.4
Materials and Supplies		681.3		680.6
Risk Management Assets		194.4		94.7
Accrued Tax Benefits		121.5		185.3
Assets Held for Sale		2,919.7		0.0
Regulatory Asset for Under-Recovered Fuel Costs		647.8	[1]	90.7
Margin Deposits		193.4		62.0
Prepayments and Other Current Assets		129.8		127.0
TOTAL CURRENT ASSETS		7,809.2		4,351.5
Property, Plant and Equipment
Generation		23,088.1		23,133.9
Transmission		29,911.1		27,886.7
Distribution		24,440.0		23,972.1
Other Property, Plant and Equipment		5,682.9		5,294.6
Construction Work in Progress		3,684.3		4,025.7
Total Property, Plant and Equipment		86,806.4		84,313.0
Accumulated Depreciation and Amortization		20,805.1		20,411.4
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		66,001.3	[2]	63,901.6
Other Noncurrent Assets
Regulatory Assets		4,142.3	[1]	3,527.0
Securitized Assets		552.8		657.0
Spent Nuclear Fuel and Decommissioning Trusts		3,867.0		3,306.7
Goodwill		52.5		52.5
Derivative Asset, Noncurrent		267.0		242.2
Operating Lease Assets		578.3		866.4
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		4,398.3		3,852.3
TOTAL OTHER NONCURRENT ASSETS		13,858.2		12,504.1
TOTAL ASSETS		87,668.7	[3]	80,757.2
Current Liabilities
Accounts Payable		2,054.6		1,709.7
Short-term Debt:
Securitized Debt for Receivables - AEP Credit	[4]	750.0		592.0
Other Short-term Debt		1,864.0		1,887.3
Total Short-term Debt		2,614.0		2,479.3
Long-term Debt Due Within One Year		2,153.8		2,086.1
Risk Management Liabilities		75.4		78.8
Customer Deposits		321.6		335.6
Accrued Taxes		1,586.4		1,476.4
Accrued Interest		273.2		267.6
Obligations Under Operating Leases		97.6		241.3
Liabilities Held for Sale		1,880.9		0.0
Regulatory Liability for Over-Recovered Fuel Costs		1.5	[5]	52.6
Other Current Liabilities		1,369.2		1,251.9
TOTAL CURRENT LIABILITIES		12,426.7		9,926.7
Noncurrent Liabilities
Long-term Debt		31,300.7		28,986.4
Long-term Debt - Affiliated		0.0		0.0
Long-term Risk Management Liabilities		230.3		232.8
Deferred Income Taxes		8,202.5		8,240.9
Regulatory Liabilities and Deferred Investment Tax Credits		8,686.3	[5]	8,378.7
Asset Retirement Obligations		2,676.2		2,469.2
Employee Benefits and Pension Obligations		328.4		336.4
Obligations Under Operating Leases		492.8		638.4
Deferred Credits and Other Noncurrent Liabilities		601.3		728.0
TOTAL NONCURRENT LIABILITIES		52,518.5		50,010.8
TOTAL LIABILITIES		64,945.2		59,937.5
Rate Matters
Commitments and Contingencies
Contingently Redeemable Performance Share Awards		43.3		45.2
Total Mezzanine Equity		43.3		45.2
Equity
Common Stock		3,408.7		3,359.3
Paid-in Capital		7,172.6		6,588.9
Retained Earnings		11,667.1		10,687.8
Accumulated Other Comprehensive Income (Loss)		184.8		(85.1)
TOTAL COMMON SHAREHOLDERS' EQUITY		22,433.2		20,550.9
Noncontrolling Interests		247.0		223.6
TOTAL EQUITY		22,680.2		20,774.5
TOTAL LIABILITIES AND EQUITY		$ 87,668.7		$ 80,757.2
Common Stock, Par Value Per Share		$ 6.50		$ 6.50
Common Stock, Shares, Issued		524,416,175		516,808,354
Common Stock, Shares Authorized		600,000,000		600,000,000
Treasury Stock, Shares		20,204,160		20,204,160
Subsidiaries [Member]
Current Assets
Restricted Cash		$ 48.0		$ 45.6
Other Temporary Investments		214.8		194.6
Short-term Debt:
Long-term Debt Due Within One Year		190.5		198.3
Noncurrent Liabilities
Long-term Debt		840.5		950.1
AEP Texas Inc. [Member]
Current Assets
Cash and Cash Equivalents		0.1		0.1
Restricted Cash		30.4		28.7
Advances to Affiliates		6.9		7.1
Accounts Receivable:
Customers		123.4		112.8
Affiliated Companies		7.9		5.1
Accrued Unbilled Revenues		77.9		65.8
Allowance for Uncollectible Accounts		(4.0)		(0.1)
Total Accounts Receivable		205.2		183.6
Materials and Supplies		73.9		70.0
Accrued Tax Benefits		24.8		16.8
Prepayments and Other Current Assets		5.9		4.6
TOTAL CURRENT ASSETS		347.2		310.9
Property, Plant and Equipment
Transmission		5,849.9		5,279.6
Distribution		4,917.2		4,580.8
Other Property, Plant and Equipment		961.1		868.4
Construction Work in Progress		551.3		614.1
Total Property, Plant and Equipment		12,279.5		11,342.9
Accumulated Depreciation and Amortization		1,644.1		1,529.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		10,635.4		9,813.6
Other Noncurrent Assets
Regulatory Assets		275.2		266.8
Securitized Assets		367.6		446.8
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		211.3		192.1
TOTAL OTHER NONCURRENT ASSETS		854.1		905.7
TOTAL ASSETS		11,836.7		11,030.2
Current Liabilities
Advances from Affiliates		26.9		67.1
Accounts Payable		306.3		231.7
Affiliated Companies		32.5		44.0
Short-term Debt:
Long-term Debt Due Within One Year		716.0		88.7
Accrued Taxes		93.3		78.3
Accrued Interest		44.7		43.9
Obligations Under Operating Leases		14.0		14.5
Other Current Liabilities		78.0		108.6
TOTAL CURRENT LIABILITIES		1,311.7		676.8
Noncurrent Liabilities
Long-term Debt		4,464.8		4,731.7
Deferred Income Taxes		1,088.9		1,016.7
Regulatory Liabilities and Deferred Investment Tax Credits		1,242.0		1,270.8
Obligations Under Operating Leases		61.3		71.0
Deferred Credits and Other Noncurrent Liabilities		73.8		57.2
TOTAL NONCURRENT LIABILITIES		6,930.8		7,147.4
TOTAL LIABILITIES		8,242.5		7,824.2
Rate Matters
Commitments and Contingencies
Equity
Paid-in Capital		1,553.9		1,457.9
Retained Earnings		2,046.8		1,757.0
Accumulated Other Comprehensive Income (Loss)		(6.5)		(8.9)
TOTAL EQUITY		3,594.2		3,206.0
TOTAL LIABILITIES AND EQUITY		11,836.7		11,030.2
AEP Texas Inc. [Member] | AEP Texas Transition and Restoration Funding [Member]
Current Assets
Restricted Cash		30.4		28.7
Other Noncurrent Assets
Securitized Assets		367.6		446.8
Short-term Debt:
Long-term Debt Due Within One Year		91.0		88.7
Accrued Interest		2.3		2.5
Noncurrent Liabilities
Long-term Debt		313.7		403.9
AEP Transmission Co [Member]
Current Assets
Cash and Cash Equivalents		0.0		0.0
Advances to Affiliates		27.2		109.1
Accounts Receivable:
Customers		22.5		22.9
Affiliated Companies		96.1		81.2
Total Accounts Receivable		118.6		104.1
Materials and Supplies		9.3		8.5
Accrued Tax Benefits		5.6		9.9
Assets Held for Sale		167.9		0.0
Prepayments and Other Current Assets		2.7		4.2
TOTAL CURRENT ASSETS		331.3		235.8
Property, Plant and Equipment
Transmission		10,886.3		9,593.5
Other Property, Plant and Equipment		427.4		329.5
Construction Work in Progress		1,394.8		1,422.6
Total Property, Plant and Equipment		12,708.5		11,345.6
Accumulated Depreciation and Amortization		772.8		572.8
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		11,935.7	[2]	10,772.8
Other Noncurrent Assets
Regulatory Assets		8.5		15.1
Deferred Property Taxes		245.7		220.1
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		3.2		2.2
TOTAL OTHER NONCURRENT ASSETS		257.4		237.4
TOTAL ASSETS		12,524.4	[6]	11,246.0
Current Liabilities
Advances from Affiliates		124.0		156.7
Accounts Payable		460.1		380.4
Affiliated Companies		69.9		97.3
Short-term Debt:
Long-term Debt Due Within One Year		104.0		50.0
Accrued Taxes		479.0		418.1
Accrued Interest		28.4		23.9
Obligations Under Operating Leases		0.9		1.2
Liabilities Held for Sale		27.6		0.0
Other Current Liabilities		3.0		9.9
TOTAL CURRENT LIABILITIES		1,296.9		1,137.5
Noncurrent Liabilities
Long-term Debt		4,239.9		3,898.5
Deferred Income Taxes		962.9		906.9
Regulatory Liabilities and Deferred Investment Tax Credits		644.1	[7]	581.8
Obligations Under Operating Leases		1.3		0.4
Deferred Credits and Other Noncurrent Liabilities		3.2		8.0
TOTAL NONCURRENT LIABILITIES		5,851.4		5,395.6
TOTAL LIABILITIES		7,148.3		6,533.1
Rate Matters
Commitments and Contingencies
Equity
Members' Capital		2,949.6		2,765.6
Retained Earnings		2,426.5		1,947.3
TOTAL MEMBER'S EQUITY		5,376.1		4,712.9
TOTAL LIABILITIES AND EQUITY		12,524.4		11,246.0
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents		2.5		5.8
Restricted Cash		17.6		16.9
Advances to Affiliates		20.8		21.4
Accounts Receivable:
Customers		158.5		142.8
Affiliated Companies		129.9		64.3
Accrued Unbilled Revenues		54.0		80.1
Miscellaneous		0.2		0.3
Allowance for Uncollectible Accounts		(1.6)		(3.1)
Total Accounts Receivable		341.0		284.4
Fuel		67.1		193.6
Materials and Supplies		109.8		99.6
Risk Management Assets		42.0		22.4
Regulatory Asset for Under-Recovered Fuel Costs		201.3		5.3
Margin Deposits		71.8		1.8
Prepayments and Other Current Assets		51.4		22.9
TOTAL CURRENT ASSETS		925.3		674.1
Property, Plant and Equipment
Generation		6,683.9		6,633.7
Transmission		4,322.4		3,900.5
Distribution		4,683.3		4,464.3
Other Property, Plant and Equipment		696.6		627.2
Construction Work in Progress		469.9		484.6
Total Property, Plant and Equipment		16,856.1		16,110.3
Accumulated Depreciation and Amortization		5,051.8		4,716.2
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		11,804.3		11,394.1
Other Noncurrent Assets
Regulatory Assets		757.6		686.3
Securitized Assets		185.1		210.1
Employee Benefits and Pension Assets		220.5		150.1
Operating Lease Assets		66.9		78.8
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		129.2		121.7
TOTAL OTHER NONCURRENT ASSETS		1,359.3		1,247.0
TOTAL ASSETS		14,088.9		13,315.2
Current Liabilities
Advances from Affiliates		199.3		18.6
Accounts Payable		262.2		212.0
Affiliated Companies		118.6		97.1
Short-term Debt:
Long-term Debt Due Within One Year		480.7		518.3
Customer Deposits		73.9		77.8
Accrued Taxes		119.7		109.9
Obligations Under Operating Leases		15.1		14.9
Other Current Liabilities		146.4		169.1
TOTAL CURRENT LIABILITIES		1,415.9		1,217.7
Noncurrent Liabilities
Long-term Debt		4,458.2		4,315.8
Deferred Income Taxes		1,804.7		1,749.9
Regulatory Liabilities and Deferred Investment Tax Credits		1,238.8		1,224.7
Asset Retirement Obligations		394.9		304.8
Employee Benefits and Pension Obligations		41.5		44.0
Obligations Under Operating Leases		52.4		64.4
Deferred Credits and Other Noncurrent Liabilities		34.6		49.6
TOTAL NONCURRENT LIABILITIES		8,025.1		7,753.2
TOTAL LIABILITIES		9,441.0		8,970.9
Rate Matters
Commitments and Contingencies
Equity
Common Stock		260.4		260.4
Paid-in Capital		1,828.7		1,828.7
Retained Earnings		2,534.4		2,248.0
Accumulated Other Comprehensive Income (Loss)		24.4		7.2
TOTAL EQUITY		4,647.9		4,344.3
TOTAL LIABILITIES AND EQUITY		$ 14,088.9		$ 13,315.2
Common Stock, No Par Value		$ 0		$ 0
Common Stock, Shares Authorized		30,000,000		30,000,000
Common Stock, Shares Outstanding		13,499,500		13,499,500
Indiana Michigan Power Co [Member]
Current Assets
Cash and Cash Equivalents		$ 1.3		$ 3.3
Advances to Affiliates		21.5		13.3
Accounts Receivable:
Customers		40.6		44.0
Affiliated Companies		78.2		51.3
Miscellaneous		2.5		2.0
Allowance for Uncollectible Accounts		(0.1)		(0.3)
Total Accounts Receivable		121.2		97.0
Fuel		56.8		86.0
Materials and Supplies		175.2		175.8
Risk Management Assets		3.3		3.6
Accrued Tax Benefits		12.7		10.3
Regulatory Asset for Under-Recovered Fuel Costs		6.4		5.4
Prepayments and Other Current Assets		41.0		24.1
TOTAL CURRENT ASSETS		439.4		418.8
Property, Plant and Equipment
Generation		5,531.8		5,264.7
Transmission		1,783.1		1,696.4
Distribution		2,800.1		2,594.6
Other Property, Plant and Equipment		792.9		686.7
Construction Work in Progress		302.8		362.4
Total Property, Plant and Equipment		11,210.7		10,604.8
Accumulated Depreciation and Amortization		3,899.8		3,552.5
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,310.9		7,052.3
Other Noncurrent Assets
Regulatory Assets		410.9		404.8
Spent Nuclear Fuel and Decommissioning Trusts		3,867.0		3,306.7
Operating Lease Assets		63.5		218.1
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		316.5		237.6
TOTAL OTHER NONCURRENT ASSETS		4,657.9		4,167.2
TOTAL ASSETS		12,408.2		11,638.3
Current Liabilities
Advances from Affiliates		93.3		103.0
Accounts Payable		174.4		153.2
Affiliated Companies		94.9		80.5
Short-term Debt:
Long-term Debt Due Within One Year		67.0		369.6
Risk Management Liabilities		5.0		0.1
Customer Deposits		45.2		41.7
Accrued Taxes		106.5		102.5
Accrued Interest		37.0		35.6
Obligations Under Finance Leases		130.5		6.4
Obligations Under Operating Leases		15.5		85.6
Regulatory Liability for Over-Recovered Fuel Costs		1.5		20.8
Other Current Liabilities		123.2		105.5
TOTAL CURRENT LIABILITIES		894.0		1,104.5
Noncurrent Liabilities
Long-term Debt		3,128.0		2,660.3
Deferred Income Taxes		1,100.2		1,064.4
Regulatory Liabilities and Deferred Investment Tax Credits		2,447.9		2,041.9
Asset Retirement Obligations		1,946.2		1,812.9
Obligations Under Operating Leases		48.9		135.9
Deferred Credits and Other Noncurrent Liabilities		58.3		69.2
TOTAL NONCURRENT LIABILITIES		8,729.5		7,784.6
TOTAL LIABILITIES		9,623.5		8,889.1
Rate Matters
Commitments and Contingencies
Equity
Common Stock		56.6		56.6
Paid-in Capital		980.9		980.9
Retained Earnings		1,748.5		1,718.7
Accumulated Other Comprehensive Income (Loss)		(1.3)		(7.0)
TOTAL EQUITY		2,784.7		2,749.2
TOTAL LIABILITIES AND EQUITY		$ 12,408.2		$ 11,638.3
Common Stock, No Par Value		$ 0		$ 0
Common Stock, Shares Authorized		2,500,000		2,500,000
Common Stock, Shares Outstanding		1,400,000		1,400,000
Indiana Michigan Power Co [Member] | DCC Fuel [Member]
Short-term Debt:
Long-term Debt Due Within One Year		$ 65.0		$ 75.7
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents		3.0		7.4
Advances to Affiliates		42.0		0.0
Accounts Receivable:
Customers		71.6		50.0
Affiliated Companies		71.8		65.1
Accrued Unbilled Revenues		1.3		14.8
Miscellaneous		5.9		3.9
Allowance for Uncollectible Accounts		(0.6)		(0.6)
Total Accounts Receivable		150.0		133.2
Materials and Supplies		74.1		66.9
Renewable Energy Credits		30.5		29.5
Prepayments and Other Current Assets		27.9		19.3
TOTAL CURRENT ASSETS		327.5		256.3
Property, Plant and Equipment
Transmission		2,992.8		2,831.9
Distribution		6,070.6		5,708.3
Other Property, Plant and Equipment		992.9		899.6
Construction Work in Progress		365.0		362.3
Total Property, Plant and Equipment		10,421.3		9,802.1
Accumulated Depreciation and Amortization		2,458.3		2,350.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,963.0		7,452.1
Other Noncurrent Assets
Regulatory Assets		293.0		385.8
Operating Lease Assets		81.2		92.0
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		601.1		524.2
TOTAL OTHER NONCURRENT ASSETS		975.3		1,002.0
TOTAL ASSETS		9,265.8		8,710.4
Current Liabilities
Advances from Affiliates		0.0		259.2
Accounts Payable		213.5		181.0
Affiliated Companies		125.4		118.4
Short-term Debt:
Long-term Debt Due Within One Year		0.1		500.1
Risk Management Liabilities		6.7		8.7
Customer Deposits		66.4		55.1
Accrued Taxes		702.4		631.0
Obligations Under Operating Leases		13.1		13.1
Regulatory Liability for Over-Recovered Fuel Costs		0.0		3.9
Other Current Liabilities		118.1		139.6
TOTAL CURRENT LIABILITIES		1,245.7		1,906.2
Noncurrent Liabilities
Long-term Debt		2,968.4		1,930.1
Long-term Risk Management Liabilities		85.8		101.6
Deferred Income Taxes		1,000.9		955.1
Regulatory Liabilities and Deferred Investment Tax Credits		1,020.9		1,005.2
Obligations Under Operating Leases		68.6		79.5
Deferred Credits and Other Noncurrent Liabilities		29.2		40.0
TOTAL NONCURRENT LIABILITIES		5,173.8		4,111.5
TOTAL LIABILITIES		6,419.5		6,017.7
Rate Matters
Commitments and Contingencies
Equity
Common Stock		321.2		321.2
Paid-in Capital		838.8		838.8
Retained Earnings		1,686.3		1,532.7
TOTAL EQUITY		2,846.3		2,692.7
TOTAL LIABILITIES AND EQUITY		$ 9,265.8		$ 8,710.4
Common Stock, No Par Value		$ 0		$ 0
Common Stock, Shares Authorized		40,000,000		40,000,000
Common Stock, Shares Outstanding		27,952,473		27,952,473
Public Service Co Of Oklahoma [Member]
Current Assets
Cash and Cash Equivalents		$ 1.3		$ 2.6
Accounts Receivable:
Customers		41.5		30.8
Affiliated Companies		35.0		15.6
Miscellaneous		0.6		2.0
Total Accounts Receivable		77.1		48.4
Fuel		14.5		17.9
Materials and Supplies		56.2		54.0
Risk Management Assets		12.1		10.3
Accrued Tax Benefits		17.6		10.9
Regulatory Asset for Under-Recovered Fuel Costs		194.6		30.1
Prepayments and Other Current Assets		13.4		7.1
TOTAL CURRENT ASSETS		386.8		181.3
Property, Plant and Equipment
Generation		1,802.4		1,480.7
Transmission		1,107.7		1,069.9
Distribution		3,004.9		2,853.0
Other Property, Plant and Equipment		437.0		393.3
Construction Work in Progress		156.0		128.7
Total Property, Plant and Equipment		6,508.0		5,925.6
Accumulated Depreciation and Amortization		1,705.2		1,605.6
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		4,802.8		4,320.0
Other Noncurrent Assets
Regulatory Assets		1,037.4		375.0
Employee Benefits and Pension Assets		95.2		65.8
Operating Lease Assets		68.9		42.6
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		7.9		6.0
TOTAL OTHER NONCURRENT ASSETS		1,209.4		489.4
TOTAL ASSETS		6,399.0		4,990.7
Current Liabilities
Advances from Affiliates		72.3		155.4
Accounts Payable		157.4		107.0
Affiliated Companies		51.0		43.4
Short-term Debt:
Long-term Debt Due Within One Year		125.5		0.5
Risk Management Liabilities		3.7		0.0
Customer Deposits		56.2		54.8
Accrued Taxes		27.0		26.8
Obligations Under Operating Leases		6.9		6.5
Other Current Liabilities		62.7		84.2
TOTAL CURRENT LIABILITIES		562.7		478.6
Noncurrent Liabilities
Long-term Debt		1,788.0		1,373.3
Deferred Income Taxes		782.3		688.5
Regulatory Liabilities and Deferred Investment Tax Credits		835.3		802.2
Asset Retirement Obligations		57.5		45.7
Obligations Under Operating Leases		62.2		36.2
Deferred Credits and Other Noncurrent Liabilities		19.4		20.6
TOTAL NONCURRENT LIABILITIES		3,544.7		2,966.5
TOTAL LIABILITIES		4,107.4		3,445.1
Rate Matters
Commitments and Contingencies
Equity
Common Stock		157.2		157.2
Paid-in Capital		1,039.0		414.0
Retained Earnings		1,095.4		974.3
Accumulated Other Comprehensive Income (Loss)		0.0		0.1
TOTAL EQUITY		2,291.6		1,545.6
TOTAL LIABILITIES AND EQUITY		$ 6,399.0		$ 4,990.7
Common Stock, Par Value Per Share		$ 15		$ 15
Common Stock, Shares, Issued		10,482,000		10,482,000
Common Stock, Shares Authorized		11,000,000		11,000,000
Common Stock, Shares Outstanding		9,013,000		9,013,000
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents		$ 51.2		$ 13.2
Advances to Affiliates		155.9		2.1
Accounts Receivable:
Customers		35.8		27.1
Affiliated Companies		38.3		25.1
Miscellaneous		12.3		12.7
Total Accounts Receivable		86.4		64.9
Fuel		82.2		191.1
Materials and Supplies		81.9		95.8
Risk Management Assets		9.8		3.2
Accrued Tax Benefits		17.8		29.9
Regulatory Asset for Under-Recovered Fuel Costs		143.9		2.6
Prepayments and Other Current Assets		39.4		25.2
TOTAL CURRENT ASSETS		668.5		428.0
Property, Plant and Equipment
Generation		4,734.5		4,681.4
Transmission		2,316.9		2,165.7
Distribution		2,514.3		2,382.5
Other Property, Plant and Equipment		764.0		788.8
Construction Work in Progress		240.7		228.3
Total Property, Plant and Equipment		10,570.4		10,246.7
Accumulated Depreciation and Amortization		3,170.3		3,158.5
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,400.1		7,088.2
Other Noncurrent Assets
Regulatory Assets		1,005.3		403.1
Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs		251.8		234.8
TOTAL OTHER NONCURRENT ASSETS		1,257.1		637.9
TOTAL ASSETS		9,325.7		8,154.1
Current Liabilities
Advances from Affiliates		0.0		124.6
Accounts Payable		163.6		135.9
Affiliated Companies		61.4		43.0
Short-term Debt:
Other Short-term Debt		0.0		35.0
Long-term Debt Due Within One Year		6.2		106.2
Risk Management Liabilities		2.1		0.7
Customer Deposits		62.4		61.3
Accrued Taxes		44.3		41.0
Accrued Interest		36.0		34.6
Obligations Under Operating Leases		8.1		7.9
Regulatory Liability for Over-Recovered Fuel Costs		0.0		37.6
Other Current Liabilities		154.6		173.4
TOTAL CURRENT LIABILITIES		538.7		763.6
Noncurrent Liabilities
Long-term Debt		3,389.0		2,530.2
Deferred Income Taxes		1,087.6		1,017.6
Regulatory Liabilities and Deferred Investment Tax Credits		806.9		863.4
Asset Retirement Obligations		192.7		193.7
Employee Benefits and Pension Obligations		20.3		18.6
Obligations Under Operating Leases		77.7		44.1
Deferred Credits and Other Noncurrent Liabilities		63.0		95.2
TOTAL NONCURRENT LIABILITIES		5,637.2		4,762.8
TOTAL LIABILITIES		6,175.9		5,526.4
Rate Matters
Commitments and Contingencies
Equity
Common Stock		0.1		0.1
Paid-in Capital		1,092.2		812.2
Retained Earnings		2,050.9		1,811.9
Accumulated Other Comprehensive Income (Loss)		6.7		1.9
TOTAL COMMON SHAREHOLDERS' EQUITY		3,149.9		2,626.1
Noncontrolling Interests		(0.1)		1.6
TOTAL EQUITY		3,149.8		2,627.7
TOTAL LIABILITIES AND EQUITY		$ 9,325.7		$ 8,154.1
Common Stock, Par Value Per Share		$ 18		$ 18
Common Stock, Shares Authorized		3,680		3,680
Common Stock, Shares Outstanding		3,680		3,680
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member]
Current Assets
Cash and Cash Equivalents		$ 49.9		$ 10.1
Accounts Receivable:
Fuel		13.1		35.2
Materials and Supplies		12.0		23.3
Property, Plant and Equipment
Other Property, Plant and Equipment		219.9		223.7
Accumulated Depreciation and Amortization		$ 168.1		$ 126.5

[1] 2021 amounts exclude $485 million of regulatory assets classified as Assets Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[2] Amount excludes $2.3 billion and $165 million for AEP and AEPTCo, respectively, of Property, Plant and Equipment - Net classified as Assets Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[3] Amount includes Assets Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[4] Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

[5] 2021 amounts exclude $148 million of regulatory liabilities classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[6] Amount includes Assets Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.

[7] 2021 amounts exclude $8 million of regulatory liabilities classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 7 for additional information.