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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Legal Reserves | The following tables contain information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Consolidated Balance Sheets.
(in millions) | December 31, 2020 |  | December 31, 2019 |
Reserves for Environmental Remediation |  |  |  |
Duke Energy | $ | 75 |  |  | $ | 58 |  |
Duke Energy Carolinas | 19 |  |  | 11 |  |
Progress Energy | 19 |  |  | 16 |  |
Duke Energy Progress | 6 |  |  | 4 |  |
Duke Energy Florida | 12 |  |  | 9 |  |
Duke Energy Ohio | 22 |  |  | 19 |  |
Duke Energy Indiana | 6 |  |  | 4 |  |
Piedmont | 10 |  |  | 8 |  |
The table below presents recorded reserves based on management’s best estimate of probable loss for legal matters, excluding asbestos-related reserves. Reserves are classified on the Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities. The reasonably possible range of loss in excess of recorded reserves is not material, other than as described above.
| December 31,
(in millions) | 2020 |  | 2019
Reserves for Legal Matters |  |  |
Duke Energy | $ | 68 |  |  | $ | 62 |
Duke Energy Carolinas | 2 |  |  | 2 |
Progress Energy | 61 |  |  | 55 |
Duke Energy Progress | 13 |  |  | 12 |
Duke Energy Florida | 28 |  |  | 22 |
Piedmont | 1 |  |  | 1 |
Schedule of Additional Possible Losses in Excess of Recorded Environmental Reserves | Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material except as presented in the table below.
(in millions) |
Duke Energy | $ | 25 |
Duke Energy Carolinas | 12 |
Duke Energy Ohio | 4 |
Piedmont | 2 |
Schedule of Purchase Power Obligations | The following table presents executory purchased power contracts with terms exceeding one year, excluding contracts classified as leases.
|  |  | Minimum Purchase Amount at December 31, 2020
| Contract |  |  |  |  |  |  |  |  |  |  |  |  |  |
(in millions) | Expiration |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | 2025 |  | Thereafter |  | Total
Duke Energy Progress(a) | 2025-2032 |  | $ | 66 |  |  | $ | 73 |  |  | $ | 66 |  |  | $ | 67 |  |  | $ | 69 |  |  | $ | 69 |  |  | $ | 410 |
Duke Energy Florida(b) | 2023-2025 |  | 335 |  |  | 354 |  |  | 374 |  |  | 262 |  |  | 91 |  |  | — |  |  | 1,416 |
Duke Energy Ohio(c)(d) | 2022 |  | 130 |  |  | 55 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 185 |
(a) Contracts represent either 100% of net plant output or vary. (b) Contracts represent 100% of net plant output. (c) Contracts represent between 1% and 11% of net plant output. (d) Excludes PPA with OVEC. See Note 17 for additional information.
Schedule of Natural Gas Supply Contract Commitments | The following table presents future unconditional purchase obligations under natural gas supply and capacity contracts as of December 31, 2020.
(in millions) | Duke Energy | Duke Energy Ohio | Piedmont
2021 | $ | 311 |  | $ | 41 |  | $ | 270 |
2022 | 270 |  | 28 |  | 242 |
2023 | 197 |  | 20 |  | 177 |
2024 | 139 |  | 17 |  | 122 |
2025 | 125 |  | 14 |  | 111 |
Thereafter | 662 |  | 60 |  | 602 |
Total | $ | 1,704 |  | $ | 180 |  | $ | 1,524 |

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- Definition Tabular disclosure of material liabilities for remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal or abandonment of a property as a result of unanticipated contamination of the assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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