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Leases (Tables)
 12 Months Ended
Dec. 31, 2023
Lease Rental Costs
Year Ended December 31, 2023AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Operating Lease Cost
$149.9 $34.0 $1.3 $18.5 $19.6 $17.3 $13.5 $17.5 
Finance Lease Cost:
Amortization of Right-of-Use Assets
69.1 7.4 — 8.3 7.3 5.0 3.3 19.9 
Interest on Lease Liabilities
11.9 1.4 — 1.8 2.5 0.9 0.7 1.4 
Total Lease Rental Costs (a)$230.9 $42.8 $1.3 $28.6 $29.4 $23.2 $17.5 $38.8 
Year Ended December 31, 2022AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Operating Lease Cost
$157.5 $18.4 $1.1 $17.9 $29.5 $16.9 $11.8 $15.3 
Finance Lease Cost:
Amortization of Right-of-Use Assets
205.5 6.8 — 7.9 78.7 4.9 3.2 10.8 
Interest on Lease Liabilities
13.4 1.3 — 2.0 3.1 0.8 0.6 2.1 
Total Lease Rental Costs (a)$376.4 $26.5 $1.1 $27.8 $111.3 $22.6 $15.6 $28.2 
Year Ended December 31, 2021AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Operating Lease Cost
$275.3 $18.4 $1.7 $19.3 $90.2 $19.0 $8.7 $12.1 
Finance Lease Cost:
Amortization of Right-of-Use Assets
74.7 6.7 — 7.7 12.9 4.9 3.2 11.0 
Interest on Lease Liabilities
14.4 1.4 — 2.4 3.0 0.8 0.6 2.5 
Total Lease Rental Costs (a)$364.4 $26.5 $1.7 $29.4 $106.1 $24.7 $12.5 $25.6 

(a)Excludes variable and short-term lease costs, which were immaterial.
Supplemental Balance Sheet Information Related to Leases
December 31, 2023AEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
Weighted-Average Remaining Lease Term (years):
Operating Leases
12.583.992.766.014.535.3623.8522.50
Finance Leases
4.635.130.004.164.954.975.764.78
Weighted-Average Discount Rate:
Operating Leases
3.73 %4.23 %3.61 %3.50 %3.89 %3.93 %3.72 %3.53 %
Finance Leases
6.19 %5.27 %— %7.04 %8.62 %5.32 %5.14 %5.22 %

December 31, 2022AEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
Weighted-Average Remaining Lease Term (years):
Operating Leases
12.694.332.055.295.795.9823.9023.55
Finance Leases
4.615.390.004.254.765.276.024.13
Weighted-Average Discount Rate:
Operating Leases
3.54 %4.15 %1.96 %3.61 %3.62 %3.73 %3.43 %3.41 %
Finance Leases
5.76 %4.75 %— %7.09 %8.99 %4.53 %4.63 %4.80 %

Year Ended December 31, 2023AEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Cash paid for amounts included in the measurement of lease liabilities:
Operating Cash Flows Used for Operating Leases
$146.8 $33.6 $1.3 $18.3 $19.5 $17.0 $12.5 $16.5 
Operating Cash Flows Used for Finance Leases
11.9 1.4 — 1.8 2.5 0.9 0.7 1.4 
Financing Cash Flows Used for Finance Leases
68.3 7.4 — 8.3 7.4 5.0 3.3 19.1 
Non-cash Acquisitions Under Operating Leases$99.8 $12.4 $1.2 $15.7 $7.9 $10.2 $15.5 $14.3 

Year Ended December 31, 2022AEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Cash paid for amounts included in the measurement of lease liabilities:
Operating Cash Flows Used for Operating Leases
$155.1 $18.3 $1.0 $17.9 $29.7 $17.5 $10.5 $13.7 
Operating Cash Flows Used for Finance Leases
13.6 1.3 — 2.0 3.2 0.8 0.6 2.1 
Financing Cash Flows Used for Finance Leases
309.5 6.8 — 7.9 130.7 4.9 3.2 10.8 
Non-cash Acquisitions Under Operating Leases$191.4 $36.7 $1.7 $23.1 $19.1 $8.4 $46.0 $53.6 
Property, Plant and Equipment and Related Obligations Under Finance Leases
December 31, 2023AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Property, Plant and Equipment Under Finance Leases:
Generation$120.1 $— $— $41.0 $28.2 $— $0.6 $25.3 
Other Property, Plant and Equipment305.9 53.9 — 22.1 42.3 33.7 25.5 32.0 
Total Property, Plant and Equipment426.0 53.9 — 63.1 70.5 33.7 26.1 57.3 
Accumulated Amortization221.5 26.3 — 37.1 39.0 15.5 12.3 28.3 
Net Property, Plant and Equipment Under Finance Leases
$204.5 $27.6 $— $26.0 $31.5 $18.2 $13.8 $29.0 
Obligations Under Finance Leases:
Noncurrent Liability$139.9 $20.6 $— $17.8 $20.8 $13.2 $10.7 $18.8 
Liability Due Within One Year65.7 7.0 — 8.2 10.7 5.0 3.1 11.3 
Total Obligations Under Finance Leases
$205.6 $27.6 $— $26.0 $31.5 $18.2 $13.8 $30.1 

December 31, 2022AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Property, Plant and Equipment Under Finance Leases:
Generation$120.9 $— $— $41.1 $28.0 $— $0.6 $25.9 
Other Property, Plant and Equipment321.4 53.7 — 20.1 40.6 32.7 25.2 58.3 
Total Property, Plant and Equipment442.3 53.7 — 61.2 68.6 32.7 25.8 84.2 
Accumulated Amortization229.6 23.6 — 31.9 34.8 13.8 10.8 54.6 
Net Property, Plant and Equipment Under Finance Leases
$212.7 $30.1 $— $29.3 $33.8 $18.9 $15.0 $29.6 
Obligations Under Finance Leases:
Noncurrent Liability$168.4 $23.1 $— $21.6 $27.1 $14.2 $11.7 $31.3 
Liability Due Within One Year57.3 7.0 — 7.7 6.9 4.7 3.3 10.9 
Total Obligations Under Finance Leases
$225.7 $30.1 $— $29.3 $34.0 $18.9 $15.0 $42.2 
Operating Lease Assets and Related Obligations
December 31, 2023AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Operating Lease Assets
$620.2 $77.6 $2.6 $73.7 $53.8 $69.9 $112.8 $126.3 
Obligations Under Operating Leases:
Noncurrent Liability$519.4 $50.9 $1.4 $59.8 $37.7 $56.7 $106.8 $122.5 
Liability Due Within One Year115.7 28.7 1.3 14.6 16.8 13.5 10.1 9.0 
Total Obligations Under Operating Leases
$635.1 $79.6 $2.7 $74.4 $54.5 $70.2 $116.9 $131.5 
December 31, 2022AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
Operating Lease Assets
$645.5 $94.7 $2.7 $73.6 $64.3 $73.8 $106.1 $123.4 
Obligations Under Operating Leases:
Noncurrent Liability$552.5 $67.8 $1.5 $59.1 $48.9 $60.3 $99.3 $120.2 
Liability Due Within One Year113.6 28.6 1.3 15.0 16.0 13.5 8.9 8.4 
Total Obligations Under Operating Leases
$666.1 $96.4 $2.8 $74.1 $64.9 $73.8 $108.2 $128.6 
Finance Lease Liabilities Rolling Future Minimum Lease Payments
Finance LeasesAEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
2024$76.8 $8.3 $— $9.9 $12.8 $5.8 $3.7 $12.6 
202548.6 6.6 — 8.5 7.2 4.3 2.9 4.6 
202633.0 5.1 — 3.5 4.5 3.1 2.5 3.9 
202726.2 4.0 — 2.3 4.0 2.5 2.0 3.5 
202819.2 2.8 — 1.9 3.3 2.0 1.7 3.0 
After 202835.4 5.1 — 3.4 7.3 3.2 3.3 7.2 
Total Future Minimum Lease Payments
239.2 31.9 — 29.5 39.1 20.9 16.1 34.8 
Less: Imputed Interest
33.6 4.3 — 3.5 7.6 2.7 2.3 4.7 
Estimated Present Value of Future Minimum Lease Payments$205.6 $27.6 $— $26.0 $31.5 $18.2 $13.8 $30.1 
Operating Lease Liabilities Rolling Future Minimum Lease Payments
Operating LeasesAEPAEP Texas AEPTCoAPCoI&MOPCoPSOSWEPCo
(in millions)
2024$141.6 $32.1 $1.4 $17.8 $18.9 $16.9 $12.2 $16.2 
2025103.3 15.7 0.7 14.8 10.6 15.3 11.1 15.0 
202692.0 13.3 0.4 13.3 9.7 14.1 10.3 12.9 
202782.6 10.7 0.2 12.1 8.9 12.8 9.3 11.5 
202867.4 7.8 0.1 10.0 7.0 10.6 7.9 9.5 
After 2028327.6 8.1 — 16.8 4.8 9.1 129.1 135.6 
Total Future Minimum Lease Payments
814.5 87.7 2.8 84.8 59.9 78.8 179.9 200.7 
Less: Imputed Interest179.4 8.1 0.1 10.4 5.4 8.6 63.0 69.2 
Estimated Present Value of Future Minimum Lease Payments$635.1 $79.6 $2.7 $74.4 $54.5 $70.2 $116.9 $131.5 
Maximum Potential Loss
CompanyMaximum
Potential Loss
(in millions)
AEP$45.3 
AEP Texas10.9 
APCo5.8 
I&M4.1 
OPCo7.2 
PSO4.7 
SWEPCo5.4