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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract] |
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] | The Company's future purchase obligations and commitments estimated for the next five years are as follows:
(In millions) | 2020 | 2021 | 2022 | 2023 | 2024 | Total
Purchase obligations and commitments: |  |  |  |  |  |
Minimum purchase commitments | $ | 82.6 |  | $ | 55.1 |  | $ | 50.4 |  | $ | 50.4 |  | $ | 32.9 |  | $ | 271.4 |
Expected wind purchase commitments | 55.7 |  | 56.0 |  | 56.4 |  | 56.8 |  | 57.5 |  | 282.4 |
Long-term service agreement commitments | 2.4 |  | 2.4 |  | 2.4 |  | 13.8 |  | 32.1 |  | 53.1 |
Environmental compliance plan expenditures | 0.4 |  | — |  | — |  | — |  | — |  | 0.4 |
Total purchase obligations and commitments | $ | 141.1 |  | $ | 113.5 |  | $ | 109.2 |  | $ | 121.0 |  | $ | 122.5 |  | $ | 607.3 |
Schedule of Wind Power Purchases [Table Text Block] | The following table summarizes OG&E's wind power purchase contracts.
Company | Location | Original Term of Contract | Expiration of Contract | MWs
CPV Keenan | Woodward County, OK | 20 years | 2030 | 152.0 |
Edison Mission Energy | Dewey County, OK | 20 years | 2031 | 130.0 |
NextEra Energy | Blackwell, OK | 20 years | 2032 | 60.0 |
The following table summarizes OG&E's wind power purchases for the years ended December 31, 2019, 2018 and 2017.
Year Ended December 31 (In millions) | 2019 | 2018 | 2017
CPV Keenan | $ | 27.2 |  | $ | 27.0 |  | $ | 29.0 |
Edison Mission Energy | 23.1 |  | 21.7 |  | 22.1 |
NextEra Energy | 7.4 |  | 6.8 |  | 7.4 |
FPL Energy (A) | — |  | 2.1 |  | 2.6 |
Total wind power purchased | $ | 57.7 |  | $ | 57.6 |  | $ | 61.1 |
(A)OG&E's purchased power contract with FPL Energy for 50 MWs expired in 2018.

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- Definition Schedule of Wind Power Purchases [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25287-109308 + Details
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