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PROPERTY, PLANT, AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, Plant and Equipment is shown functionally on the face of the balance sheets. The following tables include the total plant balances as of December 31, 2024 and 2023:
December 31, 2024AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Regulated Property, Plant and Equipment
Generation
$24,694.5 (a)$— $— $7,272.6 $5,438.5 $— $2,772.4 $5,287.5 (a)
Transmission38,871.9 7,546.2 14,913.4 5,001.5 1,957.8 3,663.9 1,345.3 2,863.8 
Distribution31,061.9 6,250.5 — 5,568.5 3,535.0 7,244.0 3,698.8 3,007.1 
Other6,544.9 1,172.9 515.9 1,023.9 948.3 1,245.3 546.8 682.7 
CWIP6,321.5 (a)1,118.0 1,965.4 742.6 330.1 691.1 378.8 627.3 (a)
Less: Accumulated Depreciation
25,794.0 2,045.7 1,578.5 6,030.9 4,607.0 2,883.0 2,214.7 3,048.5 
Total Regulated Property, Plant and Equipment - Net
81,700.7 14,041.9 15,816.2 13,578.2 7,602.7 9,961.3 6,527.4 9,419.9 
Nonregulated Property, Plant and Equipment - Net
714.9 1.6 0.3 34.3 76.6 9.8 4.9 26.2 
Total Property, Plant and Equipment - Net
$82,415.6 $14,043.5 $15,816.5 $13,612.5 $7,679.3 $9,971.1 $6,532.3 $9,446.1 

December 31, 2023AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Regulated Property, Plant and Equipment
Generation
$23,862.7 (a)$— $— $7,041.3 $5,588.7 $— $2,695.5 $4,790.7 (a)
Transmission35,903.6 6,812.6 13,723.9 4,711.8 1,906.4 3,395.1 1,228.3 2,660.6 
Distribution28,989.9 5,798.8 — 5,176.6 3,254.0 6,839.4 3,450.8 2,824.1 
Other5,986.1 1,142.9 501.2 943.7 856.8 1,114.4 502.7 544.1 
CWIP5,480.6 (a)904.6 1,563.7 709.2 294.1 654.0 313.7 555.8 (a)
Less: Accumulated Depreciation
24,093.8 1,886.7 1,291.4 5,684.0 4,353.7 2,712.7 2,083.6 2,840.8 
Total Regulated Property, Plant and Equipment - Net
76,129.1 12,772.2 14,497.4 12,898.6 7,546.3 9,290.2 6,107.4 8,534.5 
Nonregulated Property, Plant and Equipment - Net
564.3 1.8 0.3 32.9 82.7 9.7 4.9 23.9 
Total Property, Plant and Equipment - Net
$76,693.4 $12,774.0 $14,497.7 $12,931.5 $7,629.0 $9,299.9 $6,112.3 $8,558.4 

(a)AEP and SWEPCo’s regulated generation and regulated CWIP include amounts related to SWEPCo’s Arkansas jurisdictional share of the Turk Plant.
Schedule of Depreciation, Depletion and Amortization - Regulated The following tables provide total regulated annual composite depreciation rates and depreciable lives for the Registrants:
AEP
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate Ranges		Depreciable
Life Ranges		Annual Composite
Depreciation Rate Ranges		Depreciable
Life Ranges		Annual Composite
Depreciation Rate Ranges		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation2.7%-4.9%20-1622.7%-4.7%20-1622.7%-7.6%20-132
Transmission2.1%-2.7%15-792.0%-2.7%15-782.0%-2.7%24-75
Distribution2.8%-3.5%7-852.9%-3.6%7-852.7%-3.6%7-78
Other3.0%-8.9%5-753.8%-9.1%5-753.1%-14.4%5-75

AEP Texas
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Transmission2.2%50-792.2%50-752.2%50-75
Distribution2.8%15-742.9%7-702.9%7-70
Other5.9%5-546.0%5-506.2%5-50

AEPTCo
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Transmission2.7%24-782.6%24-782.6%24-75
Other7.1%5-587.0%5-586.6%5-56

APCo
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation3.2%35-1623.3%35-1623.6%35-118
Transmission2.3%15-782.3%15-782.2%24-75
Distribution3.5%12-603.6%12-603.6%12-57
Other6.8%5-557.4%5-557.3%5-55

I&M
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation4.9%20-1324.7%20-1324.9%20-132
Transmission2.6%44-672.5%44-672.5%44-67
Distribution2.8%15-762.9%14-713.1%14-71
Other8.9%5-459.1%5-4510.1%5-45

OPCo
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Transmission2.3%39-602.3%39-602.3%39-60
Distribution3.1%11-703.1%11-702.7%11-70
Other5.9%5-506.4%5-506.1%5-50
PSO
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation3.3%30-783.0%25-753.1%30-75
Transmission2.6%41-752.6%41-752.5%42-75
Distribution2.8%15-852.9%15-852.9%15-78
Other6.6%5-586.8%5-586.8%5-56

SWEPCo
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges		Annual Composite
Depreciation Rate		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation3.7%30-652.9%30-652.7%30-65
Transmission2.2%46-702.2%46-702.3%44-70
Distribution2.9%7-752.9%7-752.9%15-75
Other6.7%5-588.5%5-589.0%5-57
Schedule of Depreciation, Depletion and Amortization - Unregulated
The following table includes the nonregulated annual composite depreciation rate ranges and nonregulated depreciable life ranges for AEP. With the exception of I&M, the Registrants' depreciation rate ranges and depreciable life ranges are not meaningful for nonregulated property for 2024, 2023 and 2022.
202420232022
Functional Class of PropertyAnnual Composite
Depreciation Rate Ranges (a)		Depreciable
Life Ranges (a)		Annual Composite
Depreciation Rate Ranges		Depreciable
Life Ranges		Annual Composite
Depreciation Rate Ranges		Depreciable
Life Ranges
(in years)(in years)(in years)
Generation1.8%-6.0%39-614.8%-6.7%10-613.8%-8.7%3-61
TransmissionNANA2.5%622.8%10-62
DistributionNANANANANANA
Other9.7%5-3510.6%5-3525.2%5-35
(a) I&M's annual composite depreciation rate for Generation property is 1.8% and the depreciable life is 39 years.
NA Not applicable.
Schedule of Asset Retirement Obligation (ARO)
The following is a reconciliation of the 2024 and 2023 aggregate carrying amounts of ARO by Registrant:
CompanyARO as of December 31, 2023Accretion
Expense 		Liabilities
Incurred		Liabilities
Settled		Revisions in
Cash Flow
Estimates (a)		ARO as of December 31, 2024
(in millions)
AEP(b)(c)(d)(e)(f)$3,031.2 $140.1 $612.4 $(102.4)$(69.6)$3,611.7 
AEP Texas (e)4.5 0.2 — (0.8)— 3.9 
APCo (b)(e)(f)464.0 27.7 247.1 (18.1)81.0 801.7 
I&M (b)(c)(e)2,106.0 80.2 85.7 (2.2)(175.9)2,093.8 
OPCo (b)(e)2.1 1.4 52.9 (0.1)— 56.3 
PSO (b)(e)(f)84.2 5.8 33.7 (1.9)— 121.8 
SWEPCo (b)(d)(e)(f)281.6 16.2 30.2 (69.2)19.9 278.7 
CompanyARO as of December 31, 2022Accretion
Expense		Liabilities
Incurred		Liabilities
Settled		Revisions in
Cash Flow
Estimates (a)		ARO as of December 31, 2023
(in millions)
AEP (b)(c)(d)(e)(f)$2,943.6 $116.3 $38.9 $(130.6)$63.0 $3,031.2 
AEP Texas (e)4.5 0.2 — (0.3)0.1 4.5 
APCo (b)(e)(f)427.7 16.8 16.1 (23.1)26.5 464.0 
I&M (b)(c)(e)2,028.1 74.8 4.8 (3.7)2.0 2,106.0 
OPCo (e)5.0 0.2 — (3.1)— 2.1 
PSO (b)(e)(f)75.7 4.7 5.8 (1.2)(0.8)84.2 
SWEPCo (b)(d)(e)(f)280.9 13.7 7.5 (55.0)34.5 281.6 

(a)Unless discussed above, primarily related to ash ponds, landfills and mine reclamation, generally due to changes in estimated closure area, volumes and/or unit costs.
(b)Includes ARO related to ash disposal facilities.
(c)Includes ARO related to nuclear decommissioning costs for the Cook Plant.
(d)Includes ARO related to Sabine and DHLC.
(e)Includes ARO related to asbestos removal.
(f)Includes ARO related to renewables.
Schedule of Allowance For Equity Funds Used During Construction
The Registrants’ amounts of Allowance for Equity Funds Used During Construction are summarized in the following table:
Years Ended December 31,
Company202420232022
(in millions)
AEP$211.0 $174.9 $133.7 
AEP Texas45.9 28.4 19.7 
AEPTCo89.4 83.2 70.7 
APCo16.1 11.9 11.7 
I&M13.3 10.9 9.8 
OPCo23.4 17.1 13.9 
PSO7.4 8.4 1.5 
SWEPCo13.5 11.5 4.9 
Schedule of Allowance For Borrowed Funds Used During Construction
The Registrants’ amounts of allowance for borrowed funds used during construction, including capitalized interest, are summarized in the following table:
Years Ended December 31,
Company202420232022
(in millions)
AEP$129.8 $117.3 $63.0 
AEP Texas30.7 23.4 11.5 
AEPTCo33.7 31.4 22.4 
APCo10.5 14.1 6.5 
I&M9.2 7.7 5.7 
OPCo12.8 14.0 6.7 
PSO9.7 5.2 2.7 
SWEPCo15.1 9.8 4.3 
Schedule of Jointly-owned Electric Facilities Each Registrant’s proportionate share of the operating costs associated with these facilities is included in its statements of income and the investments and accumulated depreciation are reflected in its balance sheets under Property, Plant and Equipment as follows:
Registrant’s Share as of December 31, 2024
Fuel
Type		Percent of
Ownership		Utility Plant
in Service		Construction
Work in
Progress		Accumulated
Depreciation
(in millions)
AEP
Flint Creek Generating Station, Unit 1 (a)Coal50.0 %$404.1 $3.4 $188.8 
Turk Generating Plant (a)Coal73.3 %1,517.0 1.2 350.2 
Total
$1,921.1 $4.6 $539.0 
I&M
Rockport Generating Plant (b)(c)Coal50.0 %$1,345.0 $10.9 $1,181.8 
PSO
North Central Wind Energy Facilities (d)(e)Wind45.5 %$912.3 $1.0 $77.6 
SWEPCo
Flint Creek Generating Station, Unit 1 (a)Coal50.0 %$404.1 $3.4 $188.8 
Turk Generating Plant (a)Coal73.3 %1,517.0 1.2 350.2 
North Central Wind Energy Facilities (d)(e)Wind54.5 %1,093.5 1.2 98.1 
Total$3,014.6 $5.8 $637.1 
Registrant’s Share as of December 31, 2023
Fuel
Type		Percent of
Ownership		Utility Plant
in Service		Construction
Work in
Progress		Accumulated
Depreciation
(in millions)
AEP
Flint Creek Generating Station, Unit 1 (a)Coal50.0 %$402.8 $1.6 $167.5 
Turk Generating Plant (a)Coal73.3 %1,504.0 10.1 323.3 
Total
$1,906.8 $11.7 $490.8 
I&M
Rockport Generating Plant (b)(c)Coal50.0 %$1,341.4 $7.9 $1,018.9 
PSO
North Central Wind Energy Facilities (d)(e)Wind45.5 %$906.3 $2.4 $54.1 
SWEPCo
Flint Creek Generating Station, Unit 1 (a)Coal50.0 %$402.8 $1.6 $167.5 
Turk Generating Plant (a)Coal73.3 %1,504.0 10.1 323.3 
North Central Wind Energy Facilities (d)(e)Wind54.5 %1,086.3 2.9 67.9 
Total
$2,993.1 $14.6 $558.7 

(a)Operated by SWEPCo.
(b)Operated by I&M.
(c)AEGCo owns 50%.
(d)Operated by PSO.
(e)PSO and SWEPCo own undivided interests of 45.5% and 54.5% of the NCWF, respectively.