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Debt and Credit Facilities (Annual Maturities) (Details) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | $ 3,387 | $ 4,238
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 3,387 |
2023 | 4,725 |
2024 | 1,917 |
2025 | 3,078 |
2026 | 3,125 |
Thereafter | 46,844 |
Total long-term debt, including current maturities | 63,076 |
Purchase accounting adjustments | (1,250) | (1,300)
Other |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 434 |
Purchase Accounting Adjustments |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
Purchase accounting adjustments | $ 1,250 |
Duke Energy Parent | Debt Maturing March 2022, 3.227% interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 3.227% |
Current maturities of long-term debt | $ 300 |
Duke Energy Parent | Debt Maturing March 2022, 0.775%, floating interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 0.851% |
Current maturities of long-term debt | $ 300 |
Duke Energy Parent | Debt Maturing August 2022, 3.050% interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 3.05% |
Current maturities of long-term debt | $ 500 |
Duke Energy Parent | Debt Maturing August 2022, 2.400% interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 2.40% |
Current maturities of long-term debt | $ 500 |
Progress Energy |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 1,082 | 1,426
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 1,082 |
2023 | 1,046 |
2024 | 138 |
2025 | 639 |
2026 | 310 |
Thereafter | 17,766 |
Total long-term debt, including current maturities | $ 20,981 |
Progress Energy | Debt Maturing April 2022, 3.150% interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 3.15% |
Current maturities of long-term debt | $ 450 |
Duke Energy Indiana |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 84 | 70
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 84 |
2023 | 303 |
2024 | 4 |
2025 | 4 |
2026 | 154 |
Thereafter | 3,814 |
Total long-term debt, including current maturities | $ 4,363 |
Duke Energy Indiana | Debt Maturing January 2022, 8.850% interest rate | First Mortgage Bonds |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 8.85% |
Current maturities of long-term debt | $ 53 |
Duke Energy Carolinas |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 362 | 506
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 362 |
2023 | 1,018 |
2024 | 19 |
2025 | 496 |
2026 | 921 |
Thereafter | 10,528 |
Total long-term debt, including current maturities | $ 13,344 |
Duke Energy Carolinas | Debt Maturing May 2022, 3.350% interest rate | First Mortgage Bonds |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 3.35% |
Current maturities of long-term debt | $ 350 |
Duke Energy Progress |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 556 | 603
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 556 |
2023 | 719 |
2024 | 72 |
2025 | 575 |
2026 | 229 |
Thereafter | 8,168 |
Total long-term debt, including current maturities | $ 10,319 |
Duke Energy Progress | Debt Maturing May 2022, 2.800%, interest rate | First Mortgage Bonds |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Interest Rate | 2.80% |
Current maturities of long-term debt | $ 500 |
Duke Energy Progress | Debt Maturing February 2022, 0.305%, floating interest rate | Unsecured Debt |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Extinguishment of debt, amount | 700 |
Duke Energy Florida |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt | 76 | 823
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2022 | 76 |
2023 | 327 |
2024 | 66 |
2025 | 64 |
2026 | 81 |
Thereafter | 7,949 |
Total long-term debt, including current maturities | 8,563 |
Duke Energy Ohio |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt |  | 50
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2023 | 475 |
2025 | 245 |
2026 | 70 |
Thereafter | 2,442 |
Total long-term debt, including current maturities | 3,232 |
Piedmont |  |
Current Maturities Of Long Term Debt [Abstract] |  |
Current maturities of long-term debt |  | $ 160
Long-term Debt, Fiscal Year Maturity [Abstract] |  |
2023 | 45 |
2024 | 40 |
2025 | 205 |
2026 | 40 |
Thereafter | 2,660 |
Total long-term debt, including current maturities | $ 2,990 |

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