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Debt and Credit Facilities (Summary of Debt Issuances) (Details) | Jun. 30, 2022 USD ($) | Jun. 30, 2022 EUR (€) | Dec. 31, 2021 USD ($)
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Debt issuances | $ 4,034,000,000 |  |
Current maturities of long-term debt (includes amounts related to VIEs) | $ 3,171,000,000 |  | $ 3,387,000,000
2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 2.85% | 2.85% |
Debt issuances | $ 500,000,000 |  |
3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 3.55% | 3.55% |
Debt issuances | $ 650,000,000 |  |
3.400% March 2022 Notes Due March 2032 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 3.40% | 3.40% |
Debt issuances | $ 500,000,000 |  |
4.000% March 2022 Notes Due March 2052 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.00% | 4.00% |
Debt issuances | $ 400,000,000 |  |
5.050% May 2022 Notes Due May 2052 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 5.05% | 5.05% |
Debt issuances | $ 400,000,000 |  |
June 2022 4.750% Notes Due June 2028 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.75% | 4.75% |
Debt issuances | $ 645,000,000 |  |
June 2022 5.306% Notes Due June 2034 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 5.306% | 5.306% |
Debt issuances | $ 537,000,000 |  |
June 2022 4.000% Notes Due September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.00% | 4.00% |
Debt issuances | $ 168,000,000 |  |
June 2022 4.250% Notes Due November 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 4.25% | 4.25% |
Debt issuances | $ 234,000,000 |  |
Duke Energy (Parent) |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 1,584,000,000 |  |
Duke Energy (Parent) | June 2022 4.750% Notes Due June 2028 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 645,000,000 |  |
Duke Energy (Parent) | June 2022 5.306% Notes Due June 2034 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | $ 537,000,000 |  |
Duke Energy (Parent) | Debt Maturing August 2022, 2.400% interest rate | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 2.40% | 2.40% |
Current maturities of long-term debt (includes amounts related to VIEs) | $ 500,000,000 |  |
Duke Energy (Parent) | Senior Notes, 3.10% Due June 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 3.10% | 3.10% |
Debt issuances | € |  | € 600,000,000 |
Duke Energy (Parent) | Senior Notes, 3.85% Due June 2034 |  |  |
Debt Instrument [Line Items] |  |  |
Interest Rate | 3.85% | 3.85% |
Debt issuances | € |  | € 500,000,000 |
Duke Energy (Parent) | June 2022 4.000% Notes Due September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | $ 168,000,000 |  |
Duke Energy (Parent) | June 2022 4.250% Notes Due November 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 234,000,000 |  |
Duke Energy Carolinas |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 1,150,000,000 |  |
Current maturities of long-term debt (includes amounts related to VIEs) | 1,018,000,000 |  | 362,000,000
Duke Energy Carolinas | 2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 500,000,000 |  |
Duke Energy Carolinas | 3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 650,000,000 |  |
Duke Energy Progress |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 900,000,000 |  |
Current maturities of long-term debt (includes amounts related to VIEs) | 66,000,000 |  | $ 556,000,000
Duke Energy Progress | 3.400% March 2022 Notes Due March 2032 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 500,000,000 |  |
Duke Energy Progress | 4.000% March 2022 Notes Due March 2052 | First Mortgage Bonds |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 400,000,000 |  |
Duke Energy Progress | June 2022 4.750% Notes Due June 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Duke Energy Progress | June 2022 5.306% Notes Due June 2034 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Duke Energy Progress | June 2022 4.000% Notes Due September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Duke Energy Progress | June 2022 4.250% Notes Due November 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 400,000,000 |  |
Piedmont | 3.400% March 2022 Notes Due March 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont | 4.000% March 2022 Notes Due March 2052 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont | 5.050% May 2022 Notes Due May 2052 | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 400,000,000 |  |
Piedmont | June 2022 4.750% Notes Due June 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont | June 2022 5.306% Notes Due June 2034 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont | June 2022 4.000% Notes Due September 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | 0 |  |
Piedmont | June 2022 4.250% Notes Due November 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuances | $ 0 |  |

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