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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jan. 01, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Maximum years of participation (in years) | 35 years |  |  |
Matching contribution (as a percent) | 100.00% |  |  |
Eligible pay (as a percent) | 6.00% |  |  |
Additional contribution for employees not participating in defined pension plans (as a percent) | 4.00% |  |  |
Vesting period (in years) | 3 years |  |  |
Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Average Earnings, Period | 3 years |  |  |
Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Average Earnings, Period | 5 years |  |  |
Master Trust |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target allocation (as a percent) | 100.00% |  |  |
Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 270 | $ 676 |  |
Average remaining service period (in years) | 15 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 5,948 | 6,267 |  |
Projected benefit obligation | 5,980 | 6,299 | $ 6,358 |
Benefits paid | 645 | 607 |  |
Employer contributions | 100 | $ 100 | $ 58 |
Expected long-term rate of return on plan assets (as a percent) |  |  | 6.50% |
Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 203 |  |  |
Projected benefit obligation | 203 |  |  |
Benefits paid | 30 |  |  |
Employer contributions | $ 30 |  |  |
Pension Plan | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected long-term rate of return on plan assets (as a percent) | 8.50% | 6.50% |  |
Pension Plan | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected long-term rate of return on plan assets (as a percent) | 7.00% | 8.25% |  |
Pension Plan | Master Trust |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Master trust allocation (as a percent) | 98.00% | 98.00% |  |
Expected long-term rate of return on plan assets (as a percent) | 7.00% |  |  |
Pension Plan | Master Trust | Liability Hedging Assets |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target allocation (as a percent) |  |  |  | 35.00%
Pension Plan | Master Trust | Return Seeking Assets |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target allocation (as a percent) |  |  |  | 65.00%
Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 7 | $ 19 |  |
Average remaining service period (in years) | 7 years |  |  |
Projected benefit obligation | $ 334 | 347 | $ 437 |
Benefits paid | 37 | $ 58 |  |
Employer contributions | $ 27 |  |  |
Expected long-term rate of return on plan assets (as a percent) |  | 8.25% | 6.50% |
Other Post-Retirement Benefit Plans | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected long-term rate of return on plan assets (as a percent) | 6.50% | 6.50% |  |
Other Post-Retirement Benefit Plans | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected long-term rate of return on plan assets (as a percent) | 8.25% |  |  |
Other Post-Retirement Benefit Plans | Master Trust |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Master trust allocation (as a percent) | 2.00% | 2.00% |  |
Expected long-term rate of return on plan assets (as a percent) | 8.50% |  |  |
Target allocation (as a percent) | 100.00% |  |  |
Other Post-Retirement Benefit Plans | Master Trust | Liability Hedging Assets |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target allocation (as a percent) |  |  |  | 80.00%
Other Post-Retirement Benefit Plans | Master Trust | Return Seeking Assets |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Target allocation (as a percent) |  |  |  | 20.00%
Duke Energy Carolinas | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 73 | $ 183 |  |
Average remaining service period (in years) | 11 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 1,444 | 1,517 |  |
Projected benefit obligation | 1,444 | 1,514 | $ 1,554 |
Benefits paid | 177 | 177 |  |
Employer contributions | 26 | 26 | 15 |
Duke Energy Carolinas | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 8 |  |  |
Projected benefit obligation | 8 |  |  |
Benefits paid | 2 |  |  |
Employer contributions | 2 |  |  |
Duke Energy Carolinas | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 4 | 8 |  |
Average remaining service period (in years) | 6 years |  |  |
Projected benefit obligation | $ 63 | 69 | 112 |
Benefits paid | 8 | 14 |  |
Employer contributions | 4 |  |  |
Progress Energy | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 98 | 229 |  |
Average remaining service period (in years) | 11 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 1,861 | 1,975 |  |
Projected benefit obligation | 1,875 | 1,990 | 1,975 |
Benefits paid | 198 | 159 |  |
Employer contributions | 23 | 22 | 13 |
Progress Energy | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 72 |  |  |
Projected benefit obligation | 72 |  |  |
Benefits paid | 8 |  |  |
Employer contributions | $ 8 |  |  |
Progress Energy | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Average remaining service period (in years) | 5 years |  |  |
Projected benefit obligation | $ 146 | 146 | 168 |
Benefits paid | 15 | 22 |  |
Employer contributions | 14 |  |  |
Duke Energy Progress | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 46 | 107 |  |
Average remaining service period (in years) | 11 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 838 | 912 |  |
Projected benefit obligation | 838 | 911 | 909 |
Benefits paid | 111 | 80 |  |
Employer contributions | 14 | 13 | 8 |
Duke Energy Progress | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 22 |  |  |
Projected benefit obligation | 22 |  |  |
Benefits paid | 3 |  |  |
Employer contributions | $ 3 |  |  |
Duke Energy Progress | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Average remaining service period (in years) | 5 years |  |  |
Projected benefit obligation | $ 87 | 84 | 95 |
Benefits paid | 6 | $ 11 |  |
Employer contributions | 7 |  |  |
Duke Energy Florida |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value evaluation period (in years) |  | 5 years |  |
Duke Energy Florida | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 53 | $ 120 |  |
Average remaining service period (in years) | 12 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 1,013 | 1,053 |  |
Projected benefit obligation | 1,027 | 1,069 | 1,055 |
Benefits paid | 88 | 78 |  |
Employer contributions | 9 | 9 | 5 |
Duke Energy Florida | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 27 |  |  |
Projected benefit obligation | 27 |  |  |
Benefits paid | 3 |  |  |
Employer contributions | $ 3 |  |  |
Duke Energy Florida | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Average remaining service period (in years) | 7 years |  |  |
Projected benefit obligation | $ 60 | 60 | 69 |
Benefits paid | 6 | 10 |  |
Employer contributions | 7 |  |  |
Duke Energy Indiana | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 17 | 45 |  |
Average remaining service period (in years) | 13 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 466 | 494 |  |
Projected benefit obligation | 471 | 496 | 499 |
Benefits paid | 41 | 40 |  |
Employer contributions | 8 | 8 | 5 |
Duke Energy Indiana | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 1 |  |  |
Projected benefit obligation | $ 1 |  |  |
Duke Energy Indiana | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Average remaining service period (in years) | 6 years |  |  |
Projected benefit obligation | $ 20 | 24 | 30 |
Benefits paid | 3 | 6 |  |
Piedmont | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 10 | 23 |  |
Average remaining service period (in years) | 9 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 181 | 176 |  |
Projected benefit obligation | 181 | 175 | 170 |
Benefits paid | 12 | 16 |  |
Employer contributions | 3 | 3 | 2 |
Piedmont | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 2 |  |  |
Projected benefit obligation | 2 |  |  |
Piedmont | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 3 | 4 |  |
Average remaining service period (in years) | 6 years |  |  |
Projected benefit obligation | $ 15 | 15 | 21 |
Benefits paid | 1 | 2 |  |
Duke Energy Ohio | Pension Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets | $ 11 | 29 |  |
Average remaining service period (in years) | 14 years |  |  |
Accumulated Benefit Obligation at measurement date | $ 304 | 317 |  |
Projected benefit obligation | 309 | 325 | 333 |
Benefits paid | 33 | 31 |  |
Employer contributions | 5 | 5 | 3 |
Duke Energy Ohio | Pension Plan | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Accumulated Benefit Obligation at measurement date | 2 |  |  |
Projected benefit obligation | $ 2 |  |  |
Duke Energy Ohio | Other Post-Retirement Benefit Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets |  | 1 |  |
Average remaining service period (in years) | 6 years |  |  |
Projected benefit obligation | $ 18 | 19 | 20 |
Benefits paid | 2 | 3 |  |
Employer contributions | 2 |  |  |
Other Nonoperating Income (Expense) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actual return on plan assets |  | 24 |  |
Duke Energy Retirement Cash Balance Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 72 | $ 0 | 117 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 12 |  | 22 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Carolinas |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 3 |  | 3 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Progress Energy |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 5 |  | 5 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Progress |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 5 |  | 5 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Florida |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge |  |  | 1 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Piedmont |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 1 |  | 6 |
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Ohio |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 2 |  | 5 |
Regulatory Assets, Noncurrent | Noncurrent assets |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 60 |  | 95 |
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Carolinas |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 31 |  | 35 |
Regulatory Assets, Noncurrent | Noncurrent assets | Progress Energy |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 23 |  | 23 |
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Progress |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 16 |  | 16 |
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Florida |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 7 |  | 7 |
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Indiana |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | 3 |  | 8 |
Regulatory Assets, Noncurrent | Noncurrent assets | Piedmont |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charge | $ 4 |  | $ 29 |

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