Debt and Credit Facilities (Summary of Debt Issuances) (Details)	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Debt issuances	$ 2,050,000,000
2.850% March 2022 Notes Due March 2032
Debt Instrument [Line Items]
Interest Rate	2.85%
Debt issuances	$ 500,000,000
3.550% March 2022 Notes Due March 2052
Debt Instrument [Line Items]
Interest Rate	3.55%
Debt issuances	$ 650,000,000
3.400% March 2022 Notes Due March 2032
Debt Instrument [Line Items]
Interest Rate	3.40%
Debt issuances	$ 500,000,000
4.000% March 2022 Notes Due March 2052
Debt Instrument [Line Items]
Interest Rate	4.00%
Debt issuances	$ 400,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Duke Energy Carolinas | 2.850% March 2022 Notes Due March 2032
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas | 3.550% March 2022 Notes Due March 2052
Debt Instrument [Line Items]
Debt issuances	650,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy Progress | 3.400% March 2022 Notes Due March 2032
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | 4.000% March 2022 Notes Due March 2052
Debt Instrument [Line Items]
Debt issuances	$ 400,000,000