XML 100 R71.htm IDEA: XBRL DOCUMENT
v3.23.1

Leases (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 23, 2023 | Jan. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | $ 157.5 | $ 275.3 | $ 279.6
Finance Lease Right-of-Use Asset Amortization |  |  |  | 205.5 | 74.7 | 61.9
Interest Expense on Finance Leases |  |  |  | 13.4 | 14.4 | 15.4
Total Lease Rental Costs | [1] |  |  | $ 376.4 | $ 364.4 | 356.9
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 12 years 8 months 8 days | 10 years 4 months 20 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 4 years 7 months 9 days | 2 years 11 months 12 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.54% | 3.35% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 5.76% | 3.26% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 155.1 | $ 279.9 |
Operating Cash Flows Used for Finance Leases |  |  |  | 13.6 | 14.3 |
Financing Cash Flows Used for Finance Leases |  |  |  | 309.5 | 64.0 | 61.7
Non-cash Acquisitions Under Operating Leases |  |  |  | 191.4 | 117.0 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 25,834.2 | 24,319.6 |
Other Property, Plant and Equipment |  |  |  | 5,971.8 | 5,844.9 |
Total Property, Plant and Equipment |  |  |  | 97,021.4 | 90,225.0 |
Accumulated Amortization |  |  |  | 23,682.3 | 21,920.9 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 212.7 | 493.0 |
Other Liabilities, Noncurrent |  |  |  | 607.3 | 603.8 |
Finance Lease Liability Due Within One Year |  |  |  | 1,278.2 | 1,390.7 |
Total Obligations Under Finance Leases |  |  |  | 225.7 | 503.5 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 645.5 | 589.0 |
Operating Lease Noncurrent Liability |  |  |  | 552.5 | 501.4 |
Operating Lease Liability Due Within One Year |  |  |  | 113.6 | 99.8 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 666.1 | 601.2 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 67.9 |  |
Year 2 |  |  |  | 71.5 |  |
Year 3 |  |  |  | 41.0 |  |
Year 4 |  |  |  | 25.0 |  |
Year 5 |  |  |  | 19.3 |  |
Finance Leases, Later Years |  |  |  | 32.6 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 257.3 |  |
Imputed Interest on Finance Leases |  |  |  | 31.6 |  |
Total Obligations Under Finance Leases |  |  |  | 225.7 | 503.5 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 138.7 |  |
Year 2 |  |  |  | 125.9 |  |
Year 3 |  |  |  | 86.7 |  |
Year 4 |  |  |  | 75.5 |  |
Year 5 |  |  |  | 65.6 |  |
Operating Leases, Later Years |  |  |  | 352.2 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 844.6 |  |
Imputed Interest on Operating Leases |  |  |  | 178.5 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 666.1 | 601.2 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 46.0 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 2,345.4 | 2,989.3 | 1,339.8
Boat and Barge Leases [Member] |  |  |  |  |  |
Leases (Textuals) |  |  |  |  |  |
Maximum Potential Lease Payments, AEPRO Barge and Boat Leases |  |  |  | 27.0 |  |
Guarantor Obligations, Current Carrying Value |  |  |  | 2.0 |  |
Guarantee Obligations Current Carrying Value Other Liabilities Current |  |  |  | 1.0 |  |
Guarantee Obligations Current Carrying Value Other Liabilities Noncurrent |  |  |  | 1.0 |  |
Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 120.9 | 389.9 |
Other Property, Plant and Equipment |  |  |  | 321.4 | 328.1 |
Total Property, Plant and Equipment |  |  |  | 442.3 | 718.0 |
Accumulated Amortization |  |  |  | 229.6 | 225.0 |
Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 168.4 | 198.2 |
Finance Lease Liability Due Within One Year |  |  |  | 57.3 | 305.3 |
Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 645.5 | 589.0 |
AEP Texas Inc. [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 18.4 | 18.4 | 17.4
Finance Lease Right-of-Use Asset Amortization |  |  |  | 6.8 | 6.7 | 6.3
Interest Expense on Finance Leases |  |  |  | 1.3 | 1.4 | 1.5
Total Lease Rental Costs | [1] |  |  | $ 26.5 | $ 26.5 | 25.2
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 4 years 3 months 29 days | 5 years 10 months 28 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 5 years 4 months 20 days | 5 years 6 months 3 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 4.15% | 3.53% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 4.75% | 4.31% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 18.3 | $ 18.0 |
Operating Cash Flows Used for Finance Leases |  |  |  | 1.3 | 1.4 |
Financing Cash Flows Used for Finance Leases |  |  |  | 6.8 | 6.7 | 6.3
Non-cash Acquisitions Under Operating Leases |  |  |  | 36.7 | 4.4 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Property, Plant and Equipment |  |  |  | 1,022.8 | 961.1 |
Total Property, Plant and Equipment |  |  |  | 13,442.3 | 12,279.5 |
Accumulated Amortization |  |  |  | 1,760.7 | 1,644.1 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 30.1 | 30.8 |
Other Liabilities, Noncurrent |  |  |  | 93.2 | 73.8 |
Finance Lease Liability Due Within One Year |  |  |  | 130.7 | 78.0 |
Total Obligations Under Finance Leases |  |  |  | 30.1 | 30.8 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Noncurrent Liability |  |  |  | 67.8 | 61.3 |
Operating Lease Liability Due Within One Year |  |  |  | 28.6 | 14.0 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 96.4 | 75.3 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 8.3 |  |
Year 2 |  |  |  | 7.2 |  |
Year 3 |  |  |  | 5.5 |  |
Year 4 |  |  |  | 4.4 |  |
Year 5 |  |  |  | 3.5 |  |
Finance Leases, Later Years |  |  |  | 5.5 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 34.4 |  |
Imputed Interest on Finance Leases |  |  |  | 4.3 |  |
Total Obligations Under Finance Leases |  |  |  | 30.1 | 30.8 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 32.3 |  |
Year 2 |  |  |  | 29.7 |  |
Year 3 |  |  |  | 13.1 |  |
Year 4 |  |  |  | 10.9 |  |
Year 5 |  |  |  | 8.3 |  |
Operating Leases, Later Years |  |  |  | 11.7 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 106.0 |  |
Imputed Interest on Operating Leases |  |  |  | 9.6 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 96.4 | 75.3 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 11.1 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 716.0 | 88.7 | 392.1
AEP Texas Inc. [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 0.0 | 0.0 |
Other Property, Plant and Equipment |  |  |  | 53.7 | 50.7 |
Total Property, Plant and Equipment |  |  |  | 53.7 | 50.7 |
Accumulated Amortization |  |  |  | 23.6 | 19.9 |
AEP Texas Inc. [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 23.1 | 24.2 |
Finance Lease Liability Due Within One Year |  |  |  | 7.0 | 6.6 |
AEP Texas Inc. [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 94.7 | 73.6 |
AEP Transmission Co [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 1.1 | 1.7 | 2.6
Finance Lease Right-of-Use Asset Amortization |  |  |  | 0.0 | 0.0 | 0.0
Interest Expense on Finance Leases |  |  |  | 0.0 | 0.0 | 0.0
Total Lease Rental Costs | [1] |  |  | $ 1.1 | $ 1.7 | 2.6
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 2 years 18 days | 2 years 11 months 12 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 0 years | 0 years |
Weighted Average Discount Rate, Operating Leases |  |  |  | 1.96% | 0.90% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 0.00% | 0.00% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 1.0 | $ 1.6 |
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 |  |  |  | 1.7 | 2.1 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Property, Plant and Equipment |  |  |  | 476.8 | 451.9 |
Total Property, Plant and Equipment |  |  |  | 14,366.9 | 12,885.1 |
Accumulated Amortization |  |  |  | 1,027.0 | 784.1 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 0.0 | 0.0 |
Other Liabilities, Noncurrent |  |  |  | 69.1 | 3.2 |
Finance Lease Liability Due Within One Year |  |  |  | 8.3 | 3.3 |
Total Obligations Under Finance Leases |  |  |  | 0.0 | 0.0 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Noncurrent Liability |  |  |  | 1.5 | 1.3 |
Operating Lease Liability Due Within One Year |  |  |  | 1.3 | 0.9 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 2.8 | 2.2 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 0.0 |  |
Year 2 |  |  |  | 0.0 |  |
Year 3 |  |  |  | 0.0 |  |
Year 4 |  |  |  | 0.0 |  |
Year 5 |  |  |  | 0.0 |  |
Finance Leases, Later Years |  |  |  | 0.0 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 0.0 |  |
Imputed Interest on Finance Leases |  |  |  | 0.0 |  |
Total Obligations Under Finance Leases |  |  |  | 0.0 | 0.0 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 1.4 |  |
Year 2 |  |  |  | 0.9 |  |
Year 3 |  |  |  | 0.4 |  |
Year 4 |  |  |  | 0.2 |  |
Year 5 |  |  |  | 0.0 |  |
Operating Leases, Later Years |  |  |  | 0.0 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 2.9 |  |
Imputed Interest on Operating Leases |  |  |  | 0.1 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 2.8 | 2.2 |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 104.0 | 50.0 | 0.0
AEP Transmission Co [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 0.0 | 0.0 |
Other Property, Plant and Equipment |  |  |  | 0.0 | 0.0 |
Total Property, Plant and Equipment |  |  |  | 0.0 | 0.0 |
Accumulated Amortization |  |  |  | 0.0 | 0.0 |
AEP Transmission Co [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 0.0 | 0.0 |
Finance Lease Liability Due Within One Year |  |  |  | 0.0 | 0.0 |
AEP Transmission Co [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 2.7 | 2.0 |
Appalachian Power Co [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 17.9 | 19.3 | 19.1
Finance Lease Right-of-Use Asset Amortization |  |  |  | 7.9 | 7.7 | 7.4
Interest Expense on Finance Leases |  |  |  | 2.0 | 2.4 | 2.7
Total Lease Rental Costs | [1] |  |  | $ 27.8 | $ 29.4 | 29.2
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 5 years 3 months 14 days | 5 years 8 months 4 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 4 years 3 months | 4 years 11 months 19 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.61% | 3.42% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 7.09% | 7.16% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 17.9 | $ 19.3 |
Operating Cash Flows Used for Finance Leases |  |  |  | 2.0 | 2.4 |
Financing Cash Flows Used for Finance Leases |  |  |  | 7.9 | 7.7 | 7.4
Non-cash Acquisitions Under Operating Leases |  |  |  | 23.1 | 4.2 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 6,776.8 | 6,683.9 |
Other Property, Plant and Equipment |  |  |  | 883.3 | 696.6 |
Total Property, Plant and Equipment |  |  |  | 17,781.2 | 16,856.1 |
Accumulated Amortization |  |  |  | 5,402.0 | 5,051.8 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 29.3 | 35.7 |
Other Liabilities, Noncurrent |  |  |  | 49.6 | 34.6 |
Finance Lease Liability Due Within One Year |  |  |  | 171.2 | 146.4 |
Total Obligations Under Finance Leases |  |  |  | 29.3 | 35.7 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 73.6 | 66.9 |
Operating Lease Noncurrent Liability |  |  |  | 59.1 | 52.4 |
Operating Lease Liability Due Within One Year |  |  |  | 15.0 | 15.1 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 74.1 | 67.5 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 9.6 |  |
Year 2 |  |  |  | 8.8 |  |
Year 3 |  |  |  | 7.5 |  |
Year 4 |  |  |  | 2.9 |  |
Year 5 |  |  |  | 1.8 |  |
Finance Leases, Later Years |  |  |  | 2.8 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 33.4 |  |
Imputed Interest on Finance Leases |  |  |  | 4.1 |  |
Total Obligations Under Finance Leases |  |  |  | 29.3 | 35.7 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 17.5 |  |
Year 2 |  |  |  | 14.6 |  |
Year 3 |  |  |  | 11.8 |  |
Year 4 |  |  |  | 10.3 |  |
Year 5 |  |  |  | 9.1 |  |
Operating Leases, Later Years |  |  |  | 19.2 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 82.5 |  |
Imputed Interest on Operating Leases |  |  |  | 8.4 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 74.1 | 67.5 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 6.1 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 230.4 | 393.0 | 140.3
Appalachian Power Co [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 41.1 | 42.8 |
Other Property, Plant and Equipment |  |  |  | 20.1 | 20.4 |
Total Property, Plant and Equipment |  |  |  | 61.2 | 63.2 |
Accumulated Amortization |  |  |  | 31.9 | 27.5 |
Appalachian Power Co [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 21.6 | 28.1 |
Finance Lease Liability Due Within One Year |  |  |  | 7.7 | 7.6 |
Appalachian Power Co [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 73.6 | 66.9 |
Indiana Michigan Power Co [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 29.5 | 90.2 | 101.5
Finance Lease Right-of-Use Asset Amortization |  |  |  | 78.7 | 12.9 | 6.5
Interest Expense on Finance Leases |  |  |  | 3.1 | 3.0 | 3.1
Total Lease Rental Costs | [1] |  |  | $ 111.3 | $ 106.1 | 111.1
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 5 years 9 months 14 days | 5 years 10 months 13 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 4 years 9 months 3 days | 2 years 1 month 6 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.62% | 3.46% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 8.99% | 3.02% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 29.7 | $ 92.9 |
Operating Cash Flows Used for Finance Leases |  |  |  | 3.2 | 2.9 |
Financing Cash Flows Used for Finance Leases |  |  |  | 130.7 | 6.8 | 6.5
Non-cash Acquisitions Under Operating Leases |  |  |  | 19.1 | 2.6 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 5,585.1 | 5,531.8 |
Other Property, Plant and Equipment |  |  |  | 839.3 | 792.9 |
Total Property, Plant and Equipment |  |  |  | 11,544.3 | 11,210.7 |
Accumulated Amortization |  |  |  | 4,132.8 | 3,899.8 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 33.8 | 160.7 |
Other Liabilities, Noncurrent |  |  |  | 58.8 | 58.3 |
Finance Lease Liability Due Within One Year |  |  |  | 98.9 | 123.2 |
Total Obligations Under Finance Leases |  |  |  | 34.0 | 162.2 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 64.3 | 63.5 |
Operating Lease Noncurrent Liability |  |  |  | 48.9 | 48.9 |
Operating Lease Liability Due Within One Year |  |  |  | 16.0 | 15.5 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 64.9 | 64.4 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 9.2 |  |
Year 2 |  |  |  | 12.1 |  |
Year 3 |  |  |  | 6.3 |  |
Year 4 |  |  |  | 3.9 |  |
Year 5 |  |  |  | 3.4 |  |
Finance Leases, Later Years |  |  |  | 7.6 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 42.5 |  |
Imputed Interest on Finance Leases |  |  |  | 8.5 |  |
Total Obligations Under Finance Leases |  |  |  | 34.0 | 162.2 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 18.8 |  |
Year 2 |  |  |  | 17.7 |  |
Year 3 |  |  |  | 9.2 |  |
Year 4 |  |  |  | 8.3 |  |
Year 5 |  |  |  | 7.5 |  |
Operating Leases, Later Years |  |  |  | 9.8 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 71.3 |  |
Imputed Interest on Operating Leases |  |  |  | 6.4 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 64.9 | 64.4 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 4.4 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 83.4 | 383.5 | 93.2
Indiana Michigan Power Co [Member] | Notes Payable, Other Payables [Member] | Subsequent Event [Member] |  |  |  |  |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 8.0 | $ 8.0 |  |  |
Indiana Michigan Power Co [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 28.0 | 156.8 |
Other Property, Plant and Equipment |  |  |  | 40.6 | 42.1 |
Total Property, Plant and Equipment |  |  |  | 68.6 | 198.9 |
Accumulated Amortization |  |  |  | 34.8 | 38.2 |
Indiana Michigan Power Co [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 27.1 | 31.7 |
Finance Lease Liability Due Within One Year |  |  |  | 6.9 | 130.5 |
Indiana Michigan Power Co [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 64.3 | 63.5 |
Ohio Power Co [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 16.9 | 19.0 | 17.1
Finance Lease Right-of-Use Asset Amortization |  |  |  | 4.9 | 4.9 | 4.7
Interest Expense on Finance Leases |  |  |  | 0.8 | 0.8 | 0.9
Total Lease Rental Costs | [1] |  |  | $ 22.6 | $ 24.7 | 22.7
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 5 years 11 months 23 days | 6 years 8 months 8 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 5 years 3 months 7 days | 5 years 6 months 14 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.73% | 3.56% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 4.53% | 4.19% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 17.5 | $ 19.0 |
Operating Cash Flows Used for Finance Leases |  |  |  | 0.8 | 0.8 |
Financing Cash Flows Used for Finance Leases |  |  |  | 4.9 | 4.9 | 4.7
Non-cash Acquisitions Under Operating Leases |  |  |  | 8.4 | 4.2 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Property, Plant and Equipment |  |  |  | 1,051.4 | 992.9 |
Total Property, Plant and Equipment |  |  |  | 11,174.6 | 10,421.3 |
Accumulated Amortization |  |  |  | 2,565.3 | 2,458.3 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 18.9 | 19.3 |
Other Liabilities, Noncurrent |  |  |  | 66.0 | 29.2 |
Finance Lease Liability Due Within One Year |  |  |  | 154.2 | 118.1 |
Total Obligations Under Finance Leases |  |  |  | 18.9 | 19.3 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 73.8 | 81.2 |
Operating Lease Noncurrent Liability |  |  |  | 60.3 | 68.6 |
Operating Lease Liability Due Within One Year |  |  |  | 13.5 | 13.1 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 73.8 | 81.7 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 5.4 |  |
Year 2 |  |  |  | 4.6 |  |
Year 3 |  |  |  | 3.2 |  |
Year 4 |  |  |  | 2.6 |  |
Year 5 |  |  |  | 2.1 |  |
Finance Leases, Later Years |  |  |  | 3.4 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 21.3 |  |
Imputed Interest on Finance Leases |  |  |  | 2.4 |  |
Total Obligations Under Finance Leases |  |  |  | 18.9 | 19.3 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 16.4 |  |
Year 2 |  |  |  | 14.9 |  |
Year 3 |  |  |  | 13.2 |  |
Year 4 |  |  |  | 12.0 |  |
Year 5 |  |  |  | 10.7 |  |
Operating Leases, Later Years |  |  |  | 15.7 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 82.9 |  |
Imputed Interest on Operating Leases |  |  |  | 9.1 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 73.8 | 81.7 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 7.6 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 0.1 | 500.1 | 0.1
Ohio Power Co [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 0.0 | 0.0 |
Other Property, Plant and Equipment |  |  |  | 32.7 | 32.1 |
Total Property, Plant and Equipment |  |  |  | 32.7 | 32.1 |
Accumulated Amortization |  |  |  | 13.8 | 12.8 |
Ohio Power Co [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 14.2 | 14.9 |
Finance Lease Liability Due Within One Year |  |  |  | 4.7 | 4.4 |
Ohio Power Co [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 73.8 | 81.2 |
Public Service Co Of Oklahoma [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 11.8 | 8.7 | 7.8
Finance Lease Right-of-Use Asset Amortization |  |  |  | 3.2 | 3.2 | 3.5
Interest Expense on Finance Leases |  |  |  | 0.6 | 0.6 | 0.7
Total Lease Rental Costs | [1] |  |  | $ 15.6 | $ 12.5 | 12.0
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 23 years 10 months 24 days | 20 years 10 months 20 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 6 years 7 days | 6 years 2 months 4 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.43% | 3.35% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 4.63% | 4.23% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 10.5 | $ 8.7 |
Operating Cash Flows Used for Finance Leases |  |  |  | 0.6 | 0.6 |
Financing Cash Flows Used for Finance Leases |  |  |  | 3.2 | 3.2 | 3.5
Non-cash Acquisitions Under Operating Leases |  |  |  | 46.0 | 33.4 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 2,394.8 | 1,802.4 |
Other Property, Plant and Equipment |  |  |  | 469.3 | 437.0 |
Total Property, Plant and Equipment |  |  |  | 7,464.2 | 6,508.0 |
Accumulated Amortization |  |  |  | 1,837.7 | 1,705.2 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 15.0 | 15.3 |
Other Liabilities, Noncurrent |  |  |  | 21.3 | 19.4 |
Finance Lease Liability Due Within One Year |  |  |  | 101.8 | 66.4 |
Total Obligations Under Finance Leases |  |  |  | 15.0 | 15.3 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 106.1 | 68.9 |
Operating Lease Noncurrent Liability |  |  |  | 99.3 | 62.2 |
Operating Lease Liability Due Within One Year |  |  |  | 8.9 | 6.9 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 108.2 | 69.1 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 3.8 |  |
Year 2 |  |  |  | 3.3 |  |
Year 3 |  |  |  | 2.5 |  |
Year 4 |  |  |  | 2.2 |  |
Year 5 |  |  |  | 1.8 |  |
Finance Leases, Later Years |  |  |  | 3.7 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 17.3 |  |
Imputed Interest on Finance Leases |  |  |  | 2.3 |  |
Total Obligations Under Finance Leases |  |  |  | 15.0 | 15.3 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 11.5 |  |
Year 2 |  |  |  | 10.7 |  |
Year 3 |  |  |  | 9.5 |  |
Year 4 |  |  |  | 8.6 |  |
Year 5 |  |  |  | 7.8 |  |
Operating Leases, Later Years |  |  |  | 116.4 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 164.5 |  |
Imputed Interest on Operating Leases |  |  |  | 56.3 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 108.2 | 69.1 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 4.8 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 500.5 | 750.5 | 13.2
Public Service Co Of Oklahoma [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 0.6 | 0.6 |
Other Property, Plant and Equipment |  |  |  | 25.2 | 23.9 |
Total Property, Plant and Equipment |  |  |  | 25.8 | 24.5 |
Accumulated Amortization |  |  |  | 10.8 | 9.2 |
Public Service Co Of Oklahoma [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 11.7 | 12.3 |
Finance Lease Liability Due Within One Year |  |  |  | 3.3 | 3.0 |
Public Service Co Of Oklahoma [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | 106.1 | 68.9 |
Southwestern Electric Power Co [Member] |  |  |  |  |  |
Lease Rental Costs |  |  |  |  |  |
Operating Lease, Cost |  |  |  | 15.3 | 12.1 | 9.4
Finance Lease Right-of-Use Asset Amortization |  |  |  | 10.8 | 11.0 | 10.9
Interest Expense on Finance Leases |  |  |  | 2.1 | 2.5 | 2.2
Total Lease Rental Costs | [1] |  |  | $ 28.2 | $ 25.6 | 22.5
Supplemental Information Related to Leases |  |  |  |  |  |
Weighted-Average Remaining Lease Term, Operating Leases |  |  |  | 23 years 6 months 18 days | 20 years 2 months 26 days |
Weighted Average Remaining Lease Term, Finance Leases |  |  |  | 4 years 1 month 17 days | 4 years 6 months 10 days |
Weighted Average Discount Rate, Operating Leases |  |  |  | 3.41% | 3.34% |
Weighted Average Discount Rate, Finance Leases |  |  |  | 4.80% | 4.68% |
Operating Cash Flows Used for Operating Leases |  |  |  | $ 13.7 | $ 11.6 |
Operating Cash Flows Used for Finance Leases |  |  |  | 2.1 | 2.5 |
Financing Cash Flows Used for Finance Leases |  |  |  | 10.8 | 10.9 | 10.9
Non-cash Acquisitions Under Operating Leases |  |  |  | 53.6 | 42.9 |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 5,476.2 | 4,734.5 |
Other Property, Plant and Equipment |  |  |  | 804.4 | 764.0 |
Total Property, Plant and Equipment |  |  |  | 11,789.5 | 10,570.4 |
Accumulated Amortization |  |  |  | 3,527.3 | 3,170.3 |
Net Property, Plant and Equipment Under Finance Leases |  |  |  | 29.6 | 42.2 |
Other Liabilities, Noncurrent |  |  |  | 68.4 | 63.0 |
Finance Lease Liability Due Within One Year |  |  |  | 172.0 | 154.6 |
Total Obligations Under Finance Leases |  |  |  | 42.2 | 49.7 |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Noncurrent Liability |  |  |  | 120.2 | 77.7 |
Operating Lease Liability Due Within One Year |  |  |  | 8.4 | 8.1 |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 128.6 | 85.8 |
Finance Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 12.4 |  |
Year 2 |  |  |  | 16.5 |  |
Year 3 |  |  |  | 6.1 |  |
Year 4 |  |  |  | 2.8 |  |
Year 5 |  |  |  | 2.4 |  |
Finance Leases, Later Years |  |  |  | 5.6 |  |
Finance Leases, Total Future Minimum Lease Payments |  |  |  | 45.8 |  |
Imputed Interest on Finance Leases |  |  |  | 3.6 |  |
Total Obligations Under Finance Leases |  |  |  | 42.2 | 49.7 |
Operating Lease Liabilities Rolling Future Minimum Lease Payments |  |  |  |  |  |
Year 1 |  |  |  | 14.4 |  |
Year 2 |  |  |  | 12.7 |  |
Year 3 |  |  |  | 11.4 |  |
Year 4 |  |  |  | 10.2 |  |
Year 5 |  |  |  | 8.8 |  |
Operating Leases, Later Years |  |  |  | 141.8 |  |
Operating Leases, Total Future Minimum Lease Payments |  |  |  | 199.3 |  |
Imputed Interest on Operating Leases |  |  |  | 70.7 |  |
Estimated Present Value of Future Minimum Lease Payments on Operating Leases |  |  |  | 128.6 | 85.8 |
Maximum Potential Loss |  |  |  |  |  |
Max Potential Loss on Master Lease Agreements |  |  |  | 5.3 |  |
Leases (Textuals) |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | 6.2 | 381.2 | $ 21.2
Southwestern Electric Power Co [Member] | Finance Lease Assets [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Generation |  |  |  | 25.9 | 34.3 |
Other Property, Plant and Equipment |  |  |  | 58.3 | 55.7 |
Total Property, Plant and Equipment |  |  |  | 84.2 | 90.0 |
Accumulated Amortization |  |  |  | 54.6 | 47.8 |
Southwestern Electric Power Co [Member] | Finance Lease Liabilities [Member] |  |  |  |  |  |
Property, Plant and Equipment and Other Related Obligations Under Finance Leases |  |  |  |  |  |
Other Liabilities, Noncurrent |  |  |  | 31.3 | 38.9 |
Finance Lease Liability Due Within One Year |  |  |  | 10.9 | 10.8 |
Southwestern Electric Power Co [Member] | Operating Lease Assets [Member] |  |  |  |  |  |
Operating Lease Asset and Related Obligations |  |  |  |  |  |
Operating Lease Assets |  |  |  | $ 123.4 | $ 80.1 |
[1] | Excludes variable and short-term lease costs, which were immaterial.

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees recorded under Other Current Liabilities. + References No definition available. + Details
Name: | aep_GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees under Other Noncurrent Liabilities. + References No definition available. + Details
Name: | aep_GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Leases Textuals Abstract. + References No definition available. + Details
Name: | aep_LeasesTextualsAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential loss on master lease agreements. + References No definition available. + Details
Name: | aep_MaxPotentialLossOnMasterLeaseAgreements
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future potential lease obligations under guaranteed AEPRO boat and barge leases. + References No definition available. + Details
Name: | aep_MaximumPotentialLeasePaymentsAEPROBargeandBoatLeases
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum potential loss. + References No definition available. + Details
Name: | aep_MaximumPotentialLossAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Non-cash Acquisitions Under Operating Leases + References No definition available. + Details
Name: | aep_NoncashAcquisitionsUnderOperatingLeases
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating Lease Asset and Related Obligations + References No definition available. + Details
Name: | aep_OperatingLeaseAssetandRelatedObligationsAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Property, Plant and Equipment and Other Related Obligations Under Finance Leases + References No definition available. + Details
Name: | aep_PropertyPlantandEquipmentandOtherRelatedObligationsUnderFinanceLeasesAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Supplemental Information Related to Leases + References No definition available. + Details
Name: | aep_SupplementalInformationRelatedtoLeasesAbstract
Namespace Prefix: | aep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_FinanceLeaseInterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest paid on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 + Details
Name: | us-gaap_FinanceLeaseInterestPaymentOnLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FinanceLeaseLiabilitiesPaymentsRollingMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payment for finance lease due in next rolling 12 months following current statement of financial position date. For interim and annual periods when interim period is reported on rolling approach. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityPaymentsDueInRollingYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
Name: | us-gaap_FinanceLeasePrincipalPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_FinanceLeaseRightOfUseAssetAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted average discount rate for finance lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lease cost recognized by lessee for lease contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_LeaseCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeaseCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeaseCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeasePayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average discount rate for operating lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherLiabilitiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period end amount of property, plant and equipment (PPE) related to generation or processing owned by public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period end book value of other property, plant and equipment (PPE) owned (but not classified elsewhere) by the public utility. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_MajorPropertyClassAxis=aep_BoatandBargeLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=aep_FinanceLeaseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=aep_FinanceLeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=aep_OperatingLeaseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTransmissionCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AppalachianPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_OhioPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCoOfOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |