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LEASES - Supplemental Lease Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 12 years 9 months 18 days | 12 years 6 months 29 days |
Finance Leases | 4 years 9 months 21 days | 4 years 7 months 17 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 3.89% | 3.73% |
Finance Leases | 6.43% | 6.19% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 143.9 | $ 146.8 |
Operating Cash Flows Used for Finance Leases | 12.0 | 11.9 |
Financing Cash Flows Used for Finance Leases | 64.8 | 68.3 | $ 309.5
Non-cash Acquisitions Under Operating Leases | $ 82.3 | $ 99.8 |
AEP TEXAS INC. |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 4 years 5 months 12 days | 3 years 11 months 26 days |
Finance Leases | 5 years 14 days | 5 years 1 month 17 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 4.29% | 4.23% |
Finance Leases | 5.73% | 5.27% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 32.2 | $ 33.6 |
Operating Cash Flows Used for Finance Leases | 1.4 | 1.4 |
Financing Cash Flows Used for Finance Leases | 7.5 | 7.4 | 6.8
Non-cash Acquisitions Under Operating Leases | $ 6.0 | $ 12.4 |
AEP TRANSMISSION COMPANY, LLC |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 2 years 3 months 14 days | 2 years 9 months 3 days |
Finance Leases | 0 years | 0 years |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 4.55% | 3.61% |
Finance Leases | 0.00% | 0.00% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 1.3 | $ 1.3 |
Operating Cash Flows Used for Finance Leases | 0.0 | 0.0 |
Financing Cash Flows Used for Finance Leases | 0.0 | 0.0 |
Non-cash Acquisitions Under Operating Leases | $ 1.0 | $ 1.2 |
APPALACHIAN POWER COMPANY |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 5 years 4 months 20 days | 6 years 3 days |
Finance Leases | 4 years 1 month 2 days | 4 years 1 month 28 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 4.20% | 3.50% |
Finance Leases | 6.69% | 7.04% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 18.4 | $ 18.3 |
Operating Cash Flows Used for Finance Leases | 1.5 | 1.8 |
Financing Cash Flows Used for Finance Leases | 8.7 | 8.3 | 7.9
Non-cash Acquisitions Under Operating Leases | $ 9.3 | $ 15.7 |
INDIANA MICHIGAN POWER COMPANY |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 4 years 5 months 4 days | 4 years 6 months 10 days |
Finance Leases | 4 years 9 months 29 days | 4 years 11 months 12 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 4.11% | 3.89% |
Finance Leases | 9.07% | 8.62% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 19.6 | $ 19.5 |
Operating Cash Flows Used for Finance Leases | 2.2 | 2.5 |
Financing Cash Flows Used for Finance Leases | 7.1 | 7.4 | 130.7
Non-cash Acquisitions Under Operating Leases | $ 15.0 | $ 7.9 |
OHIO POWER COMPANY |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 4 years 7 months 20 days | 5 years 4 months 9 days |
Finance Leases | 4 years 6 months 29 days | 4 years 11 months 19 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 4.17% | 3.93% |
Finance Leases | 5.59% | 5.32% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 16.8 | $ 17.0 |
Operating Cash Flows Used for Finance Leases | 0.9 | 0.9 |
Financing Cash Flows Used for Finance Leases | 5.3 | 5.0 | 4.9
Non-cash Acquisitions Under Operating Leases | $ 4.6 | $ 10.2 |
PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 23 years 8 months 4 days | 23 years 10 months 6 days |
Finance Leases | 5 years 5 months 8 days | 5 years 9 months 3 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 3.76% | 3.72% |
Finance Leases | 5.48% | 5.14% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 12.5 | $ 12.5 |
Operating Cash Flows Used for Finance Leases | 0.7 | 0.7 |
Financing Cash Flows Used for Finance Leases | 3.3 | 3.3 | 3.2
Non-cash Acquisitions Under Operating Leases | $ 2.5 | $ 15.5 |
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Weighted-Average Remaining Lease Term (years): |  |  |
Operating Leases | 21 years 11 months 19 days | 22 years 6 months |
Finance Leases | 6 years 1 month 20 days | 4 years 9 months 10 days |
Weighted-Average Discount Rate: |  |  |
Operating Leases | 3.60% | 3.53% |
Finance Leases | 5.73% | 5.22% |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating Cash Flows Used for Operating Leases | $ 16.8 | $ 16.5 |
Operating Cash Flows Used for Finance Leases | 1.7 | 1.4 |
Financing Cash Flows Used for Finance Leases | 14.0 | 19.1 | $ 10.8
Non-cash Acquisitions Under Operating Leases | $ 26.9 | $ 14.3 |

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