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Asset Retirement Obligations (Recorded on the Balance Sheet) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | $ 12,776 | $ 13,004 | $ 13,318
Less: Current portion | 647 | 718 |
Total noncurrent asset retirement obligation | 12,129 | 12,286 |
Decommissioning of nuclear power facilities |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 7,046 |  |
Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 5,293 |  |
Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 437 |  |
Duke Energy Carolinas |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 5,301 | 5,350 | 5,734
Less: Current portion | 249 | 264 |
Total noncurrent asset retirement obligation | 5,052 | 5,086 |
Duke Energy Carolinas | Decommissioning of nuclear power facilities |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 2,847 |  |
Duke Energy Carolinas | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 2,390 |  |
Duke Energy Carolinas | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 64 |  |
Progress Energy |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 6,112 | 6,149 | 6,471
Less: Current portion | 275 | 283 |
Total noncurrent asset retirement obligation | 5,837 | 5,866 |
Progress Energy | Decommissioning of nuclear power facilities |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 4,156 |  |
Progress Energy | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 1,872 |  |
Progress Energy | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 84 |  |
Duke Energy Progress |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 5,675 | 5,635 | 5,893
Less: Current portion | 274 | 283 |
Total noncurrent asset retirement obligation | 5,401 | 5,352 |
Duke Energy Progress | Decommissioning of nuclear power facilities |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 3,792 |  |
Duke Energy Progress | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 1,839 |  |
Duke Energy Progress | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 44 |  |
Duke Energy Florida |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 437 | 514 | 578
Less: Current portion | 1 |  |
Total noncurrent asset retirement obligation | 436 | 514 |
Duke Energy Florida | Decommissioning of nuclear power facilities |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 364 |  |
Duke Energy Florida | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 33 |  |
Duke Energy Florida | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 40 |  |
Duke Energy Ohio |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 136 | 111 | 80
Less: Current portion | 13 | 3 |
Total noncurrent asset retirement obligation | 123 | 108 |
Duke Energy Ohio | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 82 |  |
Duke Energy Ohio | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 54 |  |
Duke Energy Indiana |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 987 | 1,176 | 832
Less: Current portion | 110 | 168 |
Total noncurrent asset retirement obligation | 877 | 1,008 |
Duke Energy Indiana | Closure of ash impoundments |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 949 |  |
Duke Energy Indiana | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 38 |  |
Piedmont |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | 22 | 20 | $ 17
Total noncurrent asset retirement obligation | 22 | $ 20 |
Piedmont | Other |  |  |
Asset Retirement Obligation [Line Items] |  |  |
Total asset retirement obligation | $ 22 |  |

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