Regulatory Matters (Duke Energy Carolinas Narrative) (Details) $ in Millions							12 Months Ended
	Jul. 03, 2024 USD ($)	May 17, 2024 USD ($)	Mar. 14, 2024 USD ($) numberOfCombustionTurbines MW	Jan. 04, 2024	Dec. 15, 2023	Aug. 22, 2023 USD ($)	Dec. 14, 2027 USD ($)	Dec. 14, 2026 USD ($)	Dec. 14, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 14, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges										$ 38		$ 85	$ 434
Operation, maintenance and other										5,389		5,625	5,734
Capital expenditures										12,263		12,622	11,419
Other Noncurrent Assets: Regulatory assets										14,254		13,618
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges										31		44	26
Operation, maintenance and other										1,740		1,774	1,892
Capital expenditures										3,966		3,733	3,304
Other Noncurrent Assets: Regulatory assets										4,199		3,916
Duke Energy Carolinas | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets										34		32
Duke Energy Carolinas | Hurricanes Helene, Debby and Milton
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets										583
Duke Energy Carolinas | Minimum | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Storm costs incurred										612
Capital expenditures										402
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets										802		87
Duke Energy Carolinas and Duke Energy Progress | Minimum | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Storm costs incurred										95
Capital expenditures										8
Duke Energy Carolinas and Duke Energy Progress | Minimum | Hurricanes Helene, Debby and Milton
Public Utilities, General Disclosures [Line Items]
Storm costs incurred										860
Capital expenditures										548
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges										6		29	7
Operation, maintenance and other										1,388		1,379	1,475
Capital expenditures										2,803		2,387	$ 2,070
Other Noncurrent Assets: Regulatory assets										4,555		4,546
Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets										47		$ 55
Duke Energy Progress | Hurricanes Helene, Debby and Milton
Public Utilities, General Disclosures [Line Items]
Other Noncurrent Assets: Regulatory assets										219
Duke Energy Progress | Minimum | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Storm costs incurred										248
Capital expenditures										146
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
MYRP period (in years)						3 years
Settlement amount						$ 19,500
Impairment of assets and other charges										29
Operation, maintenance and other										8
Approved rate increase (decrease) amount by state commission											$ 436
Approved return on equity (as a percent)					10.10%
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)					53.00%
2023 North Carolina Rate Case | NCUC | Duke Energy Carolinas | Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission							$ 768	$ 158	$ 174
2023 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Settlement amount						$ 4,600
2024 South Carolina Rate Case | PSCSC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Settlement amount	$ 7,400
Impairment of assets and other charges										33
Operation, maintenance and other										2
Approved rate increase (decrease) amount by state commission	$ 150	$ 240
Approved return on equity (as a percent)		9.94%
Customer giveback		$ 84
Approved capital structure (as a percent)		51.21%
Interest expense										$ 11
Proposed rate period (in years)				2 years
Marshall Combustion Turbines CPCN Proceedings | NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)			$ 104
Requested rate increase (decrease), percent			2.20%
Hydrogen-Capable Advanced-Class Simple-Cycle Combustion Turbines, Number | numberOfCombustionTurbines			2
Winter rating, combustion turbines | MW			850