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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Payment Arrangement [Abstract] |
Schedule Of Total Stock-Based Compensation Expense, net of tax | The following table summarizes the total expense recognized by the Duke Energy Registrants, net of tax, for stock-based compensation.
| Years Ended December 31,
(in millions) | 2019 |  |  | 2018 |  |  | 2017 |
Duke Energy | $ | 65 |  |  | $ | 56 |  |  | $ | 43 |
Duke Energy Carolinas | 24 |  |  | 20 |  |  | 15 |
Progress Energy | 24 |  |  | 21 |  |  | 16 |
Duke Energy Progress | 15 |  |  | 13 |  |  | 10 |
Duke Energy Florida | 9 |  |  | 8 |  |  | 6 |
Duke Energy Ohio | 5 |  |  | 4 |  |  | 3 |
Duke Energy Indiana | 6 |  |  | 5 |  |  | 4 |
Piedmont | 3 |  |  | 3 |  |  | 3 |
Schedule Of Stock-Based Compensation Expense | Duke Energy's pretax stock-based compensation costs, the tax benefit associated with stock-based compensation expense and stock-based compensation costs capitalized are included in the following table.
| Years Ended December 31,
(in millions) | 2019 |  |  | 2018 |  |  | 2017 |
RSU awards | $ | 44 |  |  | $ | 43 |  |  | $ | 41 |
Performance awards | 45 |  |  | 35 |  |  | 27 |
Pretax stock-based compensation cost | $ | 89 |  |  | $ | 78 |  |  | $ | 68 |
Stock-based compensation costs capitalized | 5 |  |  | 5 |  |  | 4 |
Stock-based compensation expense | $ | 84 |  |  | $ | 73 |  |  | $ | 64 |
Tax benefit associated with stock-based compensation expense | $ | 19 |  |  | $ | 17 |  |  | $ | 25 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity | The following table includes information related to RSU awards.
| Years Ended December 31,
| 2019 |  |  | 2018 |  |  | 2017 |
Shares granted (in thousands) | 571 |  |  | 649 |  |  | 583 |
Fair value (in millions) | $ | 51 |  |  | $ | 49 |  |  | $ | 47 |
The following table summarizes information about RSU awards outstanding.
|  |  | Weighted Average |
| Shares |  |  | Grant Date Fair Value |
| (in thousands) |  |  | (per share) |
Outstanding at December 31, 2018 | 1,153 |  |  | $ | 77 |
Granted | 571 |  |  | 89 |
Vested | (631 | ) |  | 77 |
Forfeited | (83 | ) |  | 82 |
Outstanding at December 31, 2019 | 1,010 |  |  | 83 |
RSU awards expected to vest | 951 |  |  | 83 |
Schedule of Performance Awards | The following table includes information related to stock-based performance awards.
| Years Ended December 31,
| 2019 |  |  | 2018 |  |  | 2017 |
Shares granted assuming target performance (in thousands) | 320 |  |  | 372 |  |  | 461 |
Fair value (in millions) | $ | 27 |  |  | $ | 27 |  |  | $ | 37 |
Schedule of Nonvested Performance-based Units Activity | The following table summarizes information about stock-based performance awards outstanding and assumes payout at the target level.
|  |  | Weighted Average |
| Shares |  |  | Grant Date Fair Value |
| (in thousands) |  |  | (per share) |
Outstanding at December 31, 2018 | 1,117 |  |  | $ | 77 |
Granted | 320 |  |  | 86 |
Vested | (310 | ) |  | 75 |
Forfeited | (18 | ) |  | 81 |
Outstanding at December 31, 2019 | 1,109 |  |  | 80 |
Stock-based performance awards expected to vest | 1,080 |  |  | 80 |

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