Regulatory Matters (Duke Energy Narrative) (Details) customer in Thousands, $ in Millions					12 Months Ended
	Sep. 27, 2021 contention	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 31, 2022 customer
Public Utilities, General Disclosures [Line Items]
Capital expenditures					$ 12,622	$ 11,419	$ 9,752
Operation, maintenance and other					5,625	5,734	5,703
Regulatory assets					17,266	18,130
Other Noncurrent Assets: Regulatory assets					$ 13,618	14,645
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Limit of total capital (as a percent)					30.00%
Capital expenditures					$ 939	850	848
Operation, maintenance and other					478	523	479
Regulatory assets					749	684
Other Noncurrent Assets: Regulatory assets					$ 676	581
Duke Energy Kentucky
Public Utilities, General Disclosures [Line Items]
Required minimum equity capital structure (as a percent)					35.00%
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Number of customers impacted | customer								950
Other Noncurrent Assets: Regulatory assets					$ 87
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum
Public Utilities, General Disclosures [Line Items]
Storm costs incurred					95
Capital expenditures					8
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Operation, maintenance and other					1,774	1,892	1,833
Regulatory assets					5,480	5,388
Other Noncurrent Assets: Regulatory assets					3,916	4,293
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Comment period (in years)		60 days
Number of contentions | contention	3
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission | Oconee
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years
Duke Energy Carolinas | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets					32
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Operation, maintenance and other					1,379	1,475	$ 1,467
Regulatory assets					5,488	5,414
Other Noncurrent Assets: Regulatory assets					$ 4,546	4,724
Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets						$ 55