Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 5,046	$ 4,349
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 253
Duke Energy (Parent) \| Debt Maturing September 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	0.90%
Current maturities of long-term debt	$ 650
Duke Energy (Parent) \| Debt Maturing December 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	5.00%
Current maturities of long-term debt	$ 500
Duke Energy (Parent) \| Debt Maturing April 2026 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	4.125%
Current maturities of long-term debt	$ 1,725
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 140	245
Duke Energy Ohio \| Debt Maturing October 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	3.23%
Current maturities of long-term debt	$ 95
Piedmont
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 205	205
Piedmont \| Debt Maturing September 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	3.60%
Current maturities of long-term debt	$ 150
Duke Energy Florida
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 1,235	534
Duke Energy Florida \| Debt Maturing October 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Interest rate	5.071%
Current maturities of long-term debt	$ 800
Duke Energy Florida \| Debt Maturing October 2073 and April 2074 \| First Mortgage Bonds
Debt Instrument [Line Items]
Facility term (in years)	12 months
Duke Energy Florida \| Debt Maturing October 2073 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate	4.009%
Current maturities of long-term debt	$ 200
Duke Energy Florida \| Debt Maturing April 2074 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate	4.009%
Current maturities of long-term debt	$ 173
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 582	$ 983
Duke Energy Progress \| Debt Maturing August 2025 \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate	3.25%
Current maturities of long-term debt	$ 500

Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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