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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
	Mar. 21, 2025	Jun. 07, 2021	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Apr. 16, 2025
Public Utilities, General Disclosures [Line Items]
Capital expenditures			$ 3,148	$ 3,215
Regulatory assets			14,200		$ 14,254
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Capital expenditures			1,019	952
Regulatory assets			4,149		4,199
Duke Energy Carolinas | Hurricanes Debby and Helene
Public Utilities, General Disclosures [Line Items]
Reduction in regulatory liabilities			58
Duke Energy Carolinas | Hurricanes Debby and Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred			554
Capital expenditures			404
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Capital expenditures			849	704
Regulatory assets			4,573		4,555
Duke Energy Progress | Hurricanes Debby and Helene
Public Utilities, General Disclosures [Line Items]
Reduction in regulatory liabilities			38
Duke Energy Progress | Hurricanes Debby and Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred			210
Capital expenditures			152
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Capital expenditures			559	$ 669
Regulatory assets			2,068		2,064
Duke Energy Florida | Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Capital expenditures					74
Regulatory assets			813		936
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene
Public Utilities, General Disclosures [Line Items]
Total expense incurred			100
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene | Minimum
Public Utilities, General Disclosures [Line Items]
Storm restoration costs incurred			764
Capital expenditures			$ 556
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
PSCSC | Duke Energy Carolinas | Hurricane Helene
Public Utilities, General Disclosures [Line Items]
Total storm restoration costs	$ 604
Storm reserves	$ 25
Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station | Nuclear Regulatory Commission | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)		20 years
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Storm reserves					200
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Hurricane Ian | Subsequent event
Public Utilities, General Disclosures [Line Items]
Storm reserves						$ 584
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Hurricane Ian
Public Utilities, General Disclosures [Line Items]
Storm reserves					$ 100
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Hurricane Ian | Subsequent event
Public Utilities, General Disclosures [Line Items]
Storm reserves						$ 461

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