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Derivatives and Hedging (Derivative Instruments with Credit-Risk Related Contingent Features and Cash Collateral) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Aggregate fair value of derivatives in a net liability position | $ 312 | $ 141
Fair value of collateral already posted | 21 |
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered | 291 | 141
Noncurrent liabilities |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Cash collateral posted | (8) | (16)
Noncurrent assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (60) | (59)
Current assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (17) | (33)
Duke Energy Carolinas |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Aggregate fair value of derivatives in a net liability position | 175 | 86
Fair value of collateral already posted | 19 |
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered | 156 | 86
Duke Energy Carolinas | Noncurrent liabilities |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Cash collateral posted | (7) |
Duke Energy Carolinas | Noncurrent assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (32) | (29)
Duke Energy Carolinas | Current assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (9) | (15)
Progress Energy |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Aggregate fair value of derivatives in a net liability position | 138 | 55
Fair value of collateral already posted | 2 |
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered | 136 | 55
Progress Energy | Noncurrent liabilities |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Cash collateral posted | (1) |
Progress Energy | Noncurrent assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (28) | (30)
Progress Energy | Current assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (8) | (18)
Duke Energy Progress |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Aggregate fair value of derivatives in a net liability position | 138 | 48
Fair value of collateral already posted | 2 |
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered | 136 | 48
Duke Energy Progress | Noncurrent liabilities |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Cash collateral posted | (1) |
Duke Energy Progress | Noncurrent assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | (28) | (30)
Duke Energy Progress | Current assets |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset | $ (8) | (18)
Duke Energy Florida |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Aggregate fair value of derivatives in a net liability position |  | 7
Additional cash collateral or letters of credit in the event credit risk-related contingent features were triggered |  | 7
Duke Energy Indiana | Noncurrent liabilities |  |
Schedule of Information Regarding Derivative Instruments That Contain Credit-Risk Related Contingent Features |  |
Cash collateral posted |  | $ (16)

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- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4H + Details
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