Condensed Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Current Assets
Cash and Cash Equivalents		$ 1,372.7	$ 392.7
Restricted Cash		54.0	45.6
Other Temporary Investments		218.4	200.8
Accounts Receivable:
Customers		701.2	613.6
Accrued Unbilled Revenues		279.3	248.7
Pledged Accounts Receivable - AEP Credit		1,071.1	1,018.4
Miscellaneous		50.5	33.1
Allowance for Uncollectible Accounts		(51.7)	(71.1)
Total Accounts Receivable		2,050.4	1,842.7
Fuel		290.1	629.4
Materials and Supplies		688.4	680.6
Risk Management Assets		369.2	94.7
Accrued Tax Benefits		226.6	185.3
Regulatory Asset for Under-Recovered Fuel Costs		307.0	90.7
Margin Deposits		73.2	62.0
Prepayments and Other Current Assets		135.1	127.0
TOTAL CURRENT ASSETS		5,785.1	4,351.5
Property, Plant and Equipment
Generation		24,135.9	23,133.9
Transmission		29,555.1	27,886.7
Distribution		25,057.7	23,972.1
Other Property, Plant and Equipment		5,668.5	5,294.6
Construction Work in Progress		4,151.0	4,025.7
Total Property, Plant and Equipment		88,568.2	84,313.0
Accumulated Depreciation and Amortization		21,877.0	20,411.4
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		66,691.2	63,901.6
Other Noncurrent Assets
Regulatory Assets		5,031.5	3,527.0
Securitized Assets		580.4	657.0
Spent Nuclear Fuel and Decommissioning Trusts		3,609.8	3,306.7
Goodwill		52.5	52.5
Long-term Risk Management Assets		278.3	242.2
Operating Lease Assets		779.8	866.4
Deferred Charges and Other Noncurrent Assets		3,528.5	3,852.3
TOTAL OTHER NONCURRENT ASSETS		13,860.8	12,504.1
TOTAL ASSETS		86,337.1	80,757.2
Current Liabilities
Accounts Payable		1,597.1	1,709.7
Short-term Debt:
Securitized Debt for Receivables - AEP Credit	[1]	750.0	592.0
Other Short-term Debt		1,754.0	1,887.3
Total Short-term Debt		2,504.0	2,479.3
Long-term Debt Due Within One Year		2,521.8	2,086.1
Risk Management Liabilities		106.5	78.8
Customer Deposits		400.2	335.6
Accrued Taxes		1,046.6	1,476.4
Accrued Interest		349.7	267.6
Obligations Under Operating Leases		241.8	241.3
Regulatory Liability for Over-Recovered Fuel Costs		3.5	52.6
Other Current Liabilities		1,182.8	1,199.3
TOTAL CURRENT LIABILITIES		9,954.0	9,926.7
Noncurrent Liabilities
Long-term Debt		32,056.5	28,986.4
Affiliated Long Term Debt Noncurrent		0.0	0.0
Long-term Risk Management Liabilities		199.6	232.8
Deferred Income Taxes		8,644.8	8,240.9
Regulatory Liabilities and Deferred Investment Tax Credits		8,687.8	8,378.7
Asset Retirement Obligations		2,612.0	2,469.2
Employee Benefits and Pension Obligations		322.2	336.4
Obligations Under Operating Leases		586.8	638.4
Deferred Credits and Other Noncurrent Liabilities		672.9	728.0
TOTAL NONCURRENT LIABILITIES		53,782.6	50,010.8
TOTAL LIABILITIES		63,736.6	59,937.5
Rate Matters
Commitments and Contingencies
Contingently Reedemable Performance Share Awards		73.3	45.2
Total Mezzanine Equity		73.3	45.2
Equity
Common Stock		3,404.5	3,359.3
Paid-in Capital		7,075.9	6,588.9
Retained Earnings		11,523.0	10,687.8
Accumulated Other Comprehensive Income (Loss)		274.7	(85.1)
TOTAL COMMON SHAREHOLDER'S EQUITY		22,278.1	20,550.9
Noncontrolling Interests		249.1	223.6
TOTAL EQUITY		22,527.2	20,774.5
TOTAL LIABILITIES AND EQUITY		$ 86,337.1	$ 80,757.2
Common Stock, No Par Value		$ 6.50	$ 6.50
Common Stock, Shares Authorized		600,000,000	600,000,000
Treasury Stock, Shares		20,204,160	20,204,160
Common Stock, Shares, Issued		523,773,631	516,808,354
Commodity [Member]
Equity
Cross Default Provisions Maximum Third Party Obligation Amount		$ 50.0	$ 50.0
Subsidiaries [Member]
Current Assets
Restricted Cash		54.0	45.6
Other Temporary Investments		211.5	194.6
Short-term Debt:
Long-term Debt Due Within One Year		203.2	198.3
Noncurrent Liabilities
Long-term Debt		887.0	950.1
AEP Texas Inc. [Member]
Current Assets
Cash and Cash Equivalents		0.1	0.1
Restricted Cash		43.9	28.7
Advances to Affiliates		54.6	7.1
Accounts Receivable:
Customers		142.1	112.8
Affiliated Companies - Contracts with Customers		4.8	5.1
Accrued Unbilled Revenues		81.0	65.8
Allowance for Uncollectible Accounts		(4.1)	(0.1)
Total Accounts Receivable		223.8	183.6
Materials and Supplies		72.5	70.0
Accrued Tax Benefits		23.7	16.8
Prepayments and Other Current Assets		6.9	4.6
TOTAL CURRENT ASSETS		425.5	310.9
Property, Plant and Equipment
Transmission		5,627.1	5,279.6
Distribution		4,823.7	4,580.8
Other Property, Plant and Equipment		944.3	868.4
Construction Work in Progress		539.4	614.1
Total Property, Plant and Equipment		11,934.5	11,342.9
Accumulated Depreciation and Amortization		1,621.1	1,529.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		10,313.4	9,813.6
Other Noncurrent Assets
Regulatory Assets		290.4	266.8
Securitized Assets		389.1	446.8
Deferred Charges and Other Noncurrent Assets		213.1	192.1
TOTAL OTHER NONCURRENT ASSETS		892.6	905.7
TOTAL ASSETS		11,631.5	11,030.2
Current Liabilities
Advances from Affiliates		0.0	67.1
Accounts Payable		194.3	231.7
Affiliated Companies		29.4	44.0
Short-term Debt:
Long-term Debt Due Within One Year		315.1	88.7
Accrued Taxes		114.7	78.3
Accrued Interest		60.7	43.9
Obligations Under Operating Leases		14.1	14.5
Other Current Liabilities		98.4	108.6
TOTAL CURRENT LIABILITIES		826.7	676.8
Noncurrent Liabilities
Long-term Debt		4,901.0	4,731.7
Deferred Income Taxes		1,087.1	1,016.7
Regulatory Liabilities and Deferred Investment Tax Credits		1,256.8	1,270.8
Obligations Under Operating Leases		64.5	71.0
Deferred Credits and Other Noncurrent Liabilities		63.1	57.2
TOTAL NONCURRENT LIABILITIES		7,372.5	7,147.4
TOTAL LIABILITIES		8,199.2	7,824.2
Rate Matters
Commitments and Contingencies
Equity
Paid-in Capital		1,457.9	1,457.9
Retained Earnings		1,982.4	1,757.0
Accumulated Other Comprehensive Income (Loss)		(8.0)	(8.9)
TOTAL EQUITY		3,432.3	3,206.0
TOTAL LIABILITIES AND EQUITY		11,631.5	11,030.2
AEP Texas Inc. [Member] | AEP Texas Transition Funding and Restoration Funding [Member]
Current Assets
Restricted Cash		43.9	28.7
Other Noncurrent Assets
Securitized Assets		389.1	446.8
Short-term Debt:
Long-term Debt Due Within One Year		90.1	88.7
Accrued Interest		3.0	2.5
Noncurrent Liabilities
Long-term Debt		350.9	403.9
AEP Transmission Co [Member]
Current Assets
Cash and Cash Equivalents		0.0	0.0
Advances to Affiliates		79.2	109.1
Accounts Receivable:
Customers		31.0	22.9
Affiliated Companies - Contracts with Customers		96.7	81.2
Total Accounts Receivable		127.7	104.1
Materials and Supplies		9.0	8.5
Prepayments and Other Current Assets		3.5	14.1
TOTAL CURRENT ASSETS		219.4	235.8
Property, Plant and Equipment
Transmission		10,458.4	9,593.5
Other Property, Plant and Equipment		393.5	329.5
Construction Work in Progress		1,507.4	1,422.6
Total Property, Plant and Equipment		12,359.3	11,345.6
Accumulated Depreciation and Amortization		730.4	572.8
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		11,628.9	10,772.8
Other Noncurrent Assets
Regulatory Assets		10.1	15.1
Deferred Property Taxes		66.1	220.1
Deferred Charges and Other Noncurrent Assets		6.6	2.2
TOTAL OTHER NONCURRENT ASSETS		82.8	237.4
TOTAL ASSETS		11,931.1	11,246.0
Current Liabilities
Advances from Affiliates		13.9	156.7
Accounts Payable		298.8	380.4
Affiliated Companies		67.6	97.3
Short-term Debt:
Long-term Debt Due Within One Year		50.0	50.0
Accrued Taxes		269.5	418.1
Accrued Interest		50.2	23.9
Obligations Under Operating Leases		0.9	1.2
Other Current Liabilities		8.1	9.9
TOTAL CURRENT LIABILITIES		759.0	1,137.5
Noncurrent Liabilities
Long-term Debt		4,343.4	3,898.5
Deferred Income Taxes		955.2	906.9
Regulatory Liabilities and Deferred Investment Tax Credits		633.9	581.8
Obligations Under Operating Leases		1.0	0.4
Deferred Credits and Other Noncurrent Liabilities		8.5	8.0
TOTAL NONCURRENT LIABILITIES		5,942.0	5,395.6
TOTAL LIABILITIES		6,701.0	6,533.1
Rate Matters
Commitments and Contingencies
Equity
Paid-in Captial		2,949.6	2,765.6
Retained Earnings		2,280.5	1,947.3
TOTAL MEMBER'S EQUITY		5,230.1	4,712.9
TOTAL LIABILITIES AND EQUITY		11,931.1	11,246.0
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents		5.0	5.8
Restricted Cash		10.1	16.9
Advances to Affiliates		185.2	21.4
Accounts Receivable:
Customers		119.3	142.8
Affiliated Companies - Contracts with Customers		77.4	64.3
Accrued Unbilled Revenues		53.6	80.1
Miscellaneous		0.2	0.3
Allowance for Uncollectible Accounts		(1.6)	(3.1)
Total Accounts Receivable		248.9	284.4
Fuel		66.6	193.6
Materials and Supplies		100.3	99.6
Risk Management Assets		47.0	22.4
Regulatory Asset for Under-Recovered Fuel Costs		49.2	5.3
Prepayments and Other Current Assets		72.1	24.7
TOTAL CURRENT ASSETS		784.4	674.1
Property, Plant and Equipment
Generation		6,670.8	6,633.7
Transmission		4,052.9	3,900.5
Distribution		4,621.1	4,464.3
Other Property, Plant and Equipment		682.4	627.2
Construction Work in Progress		567.7	484.6
Total Property, Plant and Equipment		16,594.9	16,110.3
Accumulated Depreciation and Amortization		4,973.1	4,716.2
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		11,621.8	11,394.1
Other Noncurrent Assets
Regulatory Assets		818.6	686.3
Securitized Assets		191.3	210.1
Employee Benefits and Pension Assets		156.8	150.1
Operating Lease Assets		70.4	78.8
Deferred Charges and Other Noncurrent Assets		93.5	121.7
TOTAL OTHER NONCURRENT ASSETS		1,330.6	1,247.0
TOTAL ASSETS		13,736.8	13,315.2
Current Liabilities
Advances from Affiliates		0.0	18.6
Accounts Payable		224.7	212.0
Affiliated Companies		97.2	97.1
Short-term Debt:
Long-term Debt Due Within One Year		380.6	518.3
Customer Deposits		72.9	77.8
Accrued Taxes		88.5	109.9
Accrued Interest		80.0	49.9
Obligations Under Operating Leases		15.1	14.9
Other Current Liabilities		107.6	119.2
TOTAL CURRENT LIABILITIES		1,066.6	1,217.7
Noncurrent Liabilities
Long-term Debt		4,557.2	4,315.8
Deferred Income Taxes		1,739.3	1,749.9
Regulatory Liabilities and Deferred Investment Tax Credits		1,250.9	1,224.7
Asset Retirement Obligations		393.6	304.8
Employee Benefits and Pension Obligations		42.9	44.0
Obligations Under Operating Leases		55.9	64.4
Deferred Credits and Other Noncurrent Liabilities		43.1	49.6
TOTAL NONCURRENT LIABILITIES		8,082.9	7,753.2
TOTAL LIABILITIES		9,149.5	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		2,485.6	2,248.0
Accumulated Other Comprehensive Income (Loss)		12.6	7.2
TOTAL EQUITY		4,587.3	4,344.3
TOTAL LIABILITIES AND EQUITY		$ 13,736.8	$ 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		$ 3.2	$ 3.3
Advances to Affiliates		80.6	13.3
Accounts Receivable:
Customers		39.8	44.0
Affiliated Companies - Contracts with Customers		37.9	51.3
Miscellaneous		2.8	2.0
Allowance for Uncollectible Accounts		(0.3)	(0.3)
Total Accounts Receivable		80.2	97.0
Fuel		46.7	86.0
Materials and Supplies		172.2	175.8
Risk Management Assets		5.5	3.6
Accrued Tax Benefits		0.1	10.3
Regulatory Asset for Under-Recovered Fuel Costs		6.1	5.4
Prepayments and Other Current Assets		26.7	24.1
TOTAL CURRENT ASSETS		421.3	418.8
Property, Plant and Equipment
Generation		5,329.6	5,264.7
Transmission		1,749.4	1,696.4
Distribution		2,734.6	2,594.6
Other Property, Plant and Equipment		684.5	686.7
Construction Work in Progress		377.6	362.4
Total Property, Plant and Equipment		10,875.7	10,604.8
Accumulated Depreciation and Amortization		3,811.9	3,552.5
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,063.8	7,052.3
Other Noncurrent Assets
Regulatory Assets		436.1	404.8
Spent Nuclear Fuel and Decommissioning Trusts		3,609.8	3,306.7
Operating Lease Assets		154.7	218.1
Deferred Charges and Other Noncurrent Assets		219.5	237.6
TOTAL OTHER NONCURRENT ASSETS		4,420.1	4,167.2
TOTAL ASSETS		11,905.2	11,638.3
Current Liabilities
Advances from Affiliates		0.0	103.0
Accounts Payable		132.8	153.2
Affiliated Companies		86.2	80.5
Short-term Debt:
Long-term Debt Due Within One Year		132.7	369.6
Risk Management Liabilities		2.5	0.1
Customer Deposits		42.4	41.7
Accrued Taxes		72.0	102.5
Accrued Interest		25.0	35.6
Obligations Under Operating Leases		86.2	85.6
Regulatory Liability for Over-Recovered Fuel Costs		3.5	20.8
Other Current Liabilities		104.2	111.9
TOTAL CURRENT LIABILITIES		687.5	1,104.5
Noncurrent Liabilities
Long-term Debt		3,098.4	2,660.3
Deferred Income Taxes		1,082.9	1,064.4
Regulatory Liabilities and Deferred Investment Tax Credits		2,201.2	2,041.9
Asset Retirement Obligations		1,869.2	1,812.9
Obligations Under Operating Leases		88.4	135.9
Deferred Credits and Other Noncurrent Liabilities		70.1	69.2
TOTAL NONCURRENT LIABILITIES		8,410.2	7,784.6
TOTAL LIABILITIES		9,097.7	8,889.1
Rate Matters
Commitments and Contingencies
Equity
Common Stock		56.6	56.6
Paid-in Capital		980.9	980.9
Retained Earnings		1,775.8	1,718.7
Accumulated Other Comprehensive Income (Loss)		(5.8)	(7.0)
TOTAL EQUITY		2,807.5	2,749.2
TOTAL LIABILITIES AND EQUITY		$ 11,905.2	$ 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		$ 78.7	$ 75.7
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents		6.8	7.4
Advances to Affiliates		622.9	0.0
Accounts Receivable:
Customers		31.0	50.0
Affiliated Companies - Contracts with Customers		64.7	65.1
Accrued Unbilled Revenues		15.3	14.8
Miscellaneous		5.8	3.9
Allowance for Uncollectible Accounts		(0.6)	(0.6)
Total Accounts Receivable		116.2	133.2
Materials and Supplies		70.9	66.9
Renewable Energy Credits		31.1	29.5
Prepayments and Other Current Assets		29.6	19.3
TOTAL CURRENT ASSETS		877.5	256.3
Property, Plant and Equipment
Transmission		2,936.3	2,831.9
Distribution		5,989.2	5,708.3
Other Property, Plant and Equipment		979.9	899.6
Construction Work in Progress		331.7	362.3
Total Property, Plant and Equipment		10,237.1	9,802.1
Accumulated Depreciation and Amortization		2,438.7	2,350.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,798.4	7,452.1
Other Noncurrent Assets
Regulatory Assets		343.8	385.8
Operating Lease Assets		84.2	92.0
Deferred Charges and Other Noncurrent Assets		292.4	524.2
TOTAL OTHER NONCURRENT ASSETS		720.4	1,002.0
TOTAL ASSETS		9,396.3	8,710.4
Current Liabilities
Advances from Affiliates		0.0	259.2
Accounts Payable		169.0	181.0
Affiliated Companies		101.5	118.4
Short-term Debt:
Long-term Debt Due Within One Year		500.1	500.1
Risk Management Liabilities		3.5	8.7
Customer Deposits		123.5	55.1
Accrued Taxes		344.8	631.0
Obligations Under Operating Leases		13.1	13.1
Other Current Liabilities		149.6	139.6
TOTAL CURRENT LIABILITIES		1,405.1	1,906.2
Noncurrent Liabilities
Long-term Debt		2,968.0	1,930.1
Long-term Risk Management Liabilities		86.9	101.6
Deferred Income Taxes		1,010.7	955.1
Regulatory Liabilities and Deferred Investment Tax Credits		995.7	1,005.2
Obligations Under Operating Leases		71.6	79.5
Deferred Credits and Other Noncurrent Liabilities		38.9	40.0
TOTAL NONCURRENT LIABILITIES		5,171.8	4,111.5
TOTAL LIABILITIES		6,576.9	6,017.7
Rate Matters
Commitments and Contingencies
Equity
Common Stock		321.2	321.2
Paid-in Capital		838.8	838.8
Retained Earnings		1,659.4	1,532.7
TOTAL EQUITY		2,819.4	2,692.7
TOTAL LIABILITIES AND EQUITY		$ 9,396.3	$ 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		$ 3.6	$ 2.6
Advances to Affiliates		59.5	0.0
Accounts Receivable:
Customers		29.7	30.8
Affiliated Companies - Contracts with Customers		31.7	15.6
Miscellaneous		0.4	2.0
Total Accounts Receivable		61.8	48.4
Fuel		7.6	17.9
Materials and Supplies		54.4	54.0
Risk Management Assets		18.5	10.3
Accrued Tax Benefits		35.7	10.9
Regulatory Asset for Under-Recovered Fuel Costs		133.4	30.1
Prepayments and Other Current Assets		13.1	7.1
TOTAL CURRENT ASSETS		387.6	181.3
Property, Plant and Equipment
Generation		1,795.2	1,480.7
Transmission		1,095.9	1,069.9
Distribution		2,959.7	2,853.0
Other Property, Plant and Equipment		427.8	393.3
Construction Work in Progress		127.7	128.7
Total Property, Plant and Equipment		6,406.3	5,925.6
Accumulated Depreciation and Amortization		1,682.6	1,605.6
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		4,723.7	4,320.0
Other Noncurrent Assets
Regulatory Assets		1,052.3	375.0
Employee Benefits and Pension Assets		66.2	65.8
Operating Lease Assets		70.4	42.6
Deferred Charges and Other Noncurrent Assets		18.9	6.0
TOTAL OTHER NONCURRENT ASSETS		1,207.8	489.4
TOTAL ASSETS		6,319.1	4,990.7
Current Liabilities
Advances from Affiliates		0.0	155.4
Accounts Payable		146.4	107.0
Affiliated Companies		32.0	43.4
Short-term Debt:
Long-term Debt Due Within One Year		0.5	0.5
Customer Deposits		54.0	54.8
Accrued Taxes		60.9	26.8
Obligations Under Operating Leases		6.9	6.5
Other Current Liabilities		67.9	84.2
TOTAL CURRENT LIABILITIES		368.6	478.6
Noncurrent Liabilities
Long-term Debt		1,912.8	1,373.3
Deferred Income Taxes		764.0	688.5
Regulatory Liabilities and Deferred Investment Tax Credits		846.2	802.2
Asset Retirement Obligations		55.0	45.7
Obligations Under Operating Leases		63.7	36.2
Deferred Credits and Other Noncurrent Liabilities		21.7	20.6
TOTAL NONCURRENT LIABILITIES		3,663.4	2,966.5
TOTAL LIABILITIES		4,032.0	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		1,090.9	974.3
Accumulated Other Comprehensive Income (Loss)		0.0	0.1
TOTAL EQUITY		2,287.1	1,545.6
TOTAL LIABILITIES AND EQUITY		$ 6,319.1	$ 4,990.7
Common Stock, Shares Authorized		11,000,000	11,000,000
Common Stock, Shares, Outstanding		9,013,000	9,013,000
Common Stock, Par or Stated Value Per Share		$ 15	$ 15
Common Stock, Shares, Issued		10,482,000	10,482,000
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents		$ 45.0	$ 13.2
Advances to Affiliates		2.1	2.1
Accounts Receivable:
Customers		76.2	27.1
Affiliated Companies - Contracts with Customers		35.6	25.1
Miscellaneous		23.3	12.7
Total Accounts Receivable		135.1	64.9
Fuel		95.4	191.1
Materials and Supplies		86.8	95.8
Risk Management Assets		17.5	3.2
Accrued Tax Benefits		19.8	29.9
Regulatory Asset for Under-Recovered Fuel Costs		38.7	2.6
Prepayments and Other Current Assets		20.8	25.2
TOTAL CURRENT ASSETS		461.2	428.0
Property, Plant and Equipment
Generation		5,065.5	4,681.4
Transmission		2,264.6	2,165.7
Distribution		2,499.2	2,382.5
Other Property, Plant and Equipment		817.6	788.8
Construction Work in Progress		195.5	228.3
Total Property, Plant and Equipment		10,842.4	10,246.7
Accumulated Depreciation and Amortization		3,478.5	3,158.5
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,363.9	7,088.2
Other Noncurrent Assets
Regulatory Assets		1,068.0	403.1
Long-term Risk Management Assets		2.1	0.0
Deferred Charges and Other Noncurrent Assets		277.3	234.8
TOTAL OTHER NONCURRENT ASSETS		1,347.4	637.9
TOTAL ASSETS		9,172.5	8,154.1
Current Liabilities
Advances from Affiliates		122.9	124.6
Accounts Payable		114.7	135.9
Affiliated Companies		43.4	43.0
Short-term Debt:
Other Short-term Debt		0.0	35.0
Long-term Debt Due Within One Year		381.2	106.2
Risk Management Liabilities		0.0	0.7
Customer Deposits		60.7	61.3
Accrued Taxes		103.1	41.0
Accrued Interest		23.0	34.6
Obligations Under Operating Leases		8.3	7.9
Other Current Liabilities		119.6	173.4
TOTAL CURRENT LIABILITIES		976.9	763.6
Noncurrent Liabilities
Long-term Debt		2,748.7	2,530.2
Long-term Risk Management Liabilities		0.0	1.0
Deferred Income Taxes		1,067.6	1,017.6
Regulatory Liabilities and Deferred Investment Tax Credits		879.8	863.4
Asset Retirement Obligations		193.4	193.7
Employee Benefits and Pension Obligations		23.8	18.6
Obligations Under Operating Leases		79.2	44.1
Deferred Credits and Other Noncurrent Liabilities		88.6	94.2
TOTAL NONCURRENT LIABILITIES		5,081.1	4,762.8
TOTAL LIABILITIES		6,058.0	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		2,020.0	1,811.9
Accumulated Other Comprehensive Income (Loss)		1.8	1.9
TOTAL COMMON SHAREHOLDER'S EQUITY		3,114.1	2,626.1
Noncontrolling Interests		0.4	1.6
TOTAL EQUITY		3,114.5	2,627.7
TOTAL LIABILITIES AND EQUITY		$ 9,172.5	$ 8,154.1
Common Stock, No Par Value		$ 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		$ 41.0	$ 10.1
Accounts Receivable:
Fuel		6.7	35.2
Materials and Supplies		15.9	23.3
Property, Plant and Equipment
Other Property, Plant and Equipment		220.2	223.7
Accumulated Depreciation and Amortization		$ 156.7	$ 126.5

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