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Severance (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring and Related Activities [Abstract] |
Schedule of Severance Expense | The following table presents the direct and allocated severance and related charges accrued for approximately 30 e mployees in 2020, 140 employees in 2019, and 1,900 employees in 2018, by the Duke Energy Registrants within Operation, maintenance and other on the Consolidated Statements of Operations.
|  | Duke |  | Duke | Duke | Duke | Duke |
| Duke | Energy | Progress | Energy | Energy | Energy | Energy |
(in millions) | Energy | Carolinas | Energy | Progress | Florida | Ohio | Indiana | Piedmont
Year Ended December 31, 2020(a)(b) | $ | (85) |  | $ | (58) |  | $ | (28) |  | $ | (31) |  | $ | 3 |  | $ | — |  | $ | — |  | $ | — |
Year Ended December 31, 2019 | 16 |  | 8 |  | 6 |  | 3 |  | 3 |  | — |  | 1 |  | 1 |
Year Ended December 31, 2018 | 187 |  | 102 |  | 69 |  | 52 |  | 17 |  | 6 |  | 7 |  | 2 |
(a) Includes unamortized deferred severance charges of approximately $(86) million, $(57) million, $(29) million and $(29) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively. (b) Includes adjustments associated with 2018 severance charges of approximately $(6) million, $(2) million, $(3) million and $(2) million for Duke Energy, Duke Energy Carolinas, Progress Energy and Duke Energy Progress, respectively.
Schedule of Severance Liability | The table below presents the severance liability for past and ongoing severance plans including the plans described above.
|  | Duke |  | Duke | Duke | Duke | Duke |
| Duke | Energy | Progress | Energy | Energy | Energy | Energy |
(in millions) | Energy | Carolinas | Energy | Progress | Florida | Ohio | Indiana | Piedmont
Balance at December 31, 2019 | $ | 41 |  | $ | 11 |  | $ | 13 |  | $ | 6 |  | $ | 7 |  | $ | 1 |  | $ | 2 |  | $ | — |
Provision/Adjustments | 1 |  | — |  | — |  | (2) |  | 2 |  | (1) |  | — |  | — |
Cash Reductions | (31) |  | (9) |  | (10) |  | (3) |  | (7) |  | — |  | (1) |  | — |
Balance at December 31, 2020 | $ | 11 |  | $ | 2 |  | $ | 3 |  | $ | 1 |  | $ | 2 |  | $ | — |  | $ | 1 |  | $ | — |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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