Regulatory Matters (Duke Energy Progress Narrative) (Details) - USD ($) $ in Millions						7 Months Ended	12 Months Ended
	Aug. 18, 2023	May 31, 2023	Apr. 16, 2023	Oct. 06, 2022	Sep. 01, 2022	Dec. 31, 2025	Aug. 17, 2027	Aug. 17, 2026	May 31, 2026	Aug. 17, 2025	May 31, 2025	Aug. 17, 2024	May 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges														$ 85	$ 434	$ 353
Operation, maintenance and other														5,625	5,734	5,703
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges														29	7	63
Operation, maintenance and other														1,379	$ 1,475	$ 1,467
2022 North Carolina Rate Case | NCUC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)			3 years	3 years
Settlement amount	$ 12,200
MYRP period (in years)	3 years
Approved return on equity (as a percent)	9.80%
Impairment of assets and other charges														28
Operation, maintenance and other														$ 8
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)	53.00%
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Debt
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)	47.00%
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)						$ 615			$ 138		$ 151		$ 326
Approved rate increase (decrease) amount by state commission							$ 494	$ 135		$ 126
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Forecast | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission												$ 233
2022 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Settlement amount	$ 3,500
2023 South Carolina Storm Securitization | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Public Utilities, Storm Costs		$ 171
2022 South Carolina Rate Case | PSCSC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission					$ 52
2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission					$ 36
Approved return on equity (as a percent)					9.60%
Deferred compliance costs period (in years)					33 months
2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress | Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)					52.43%
2022 South Carolina Rate Case, Retail Rate Case | PSCSC | Duke Energy Progress | Debt
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)					47.57%
2022 South Carolina Rate Case, Coal Ash Basin Closure Costs | PSCSC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Deferred compliance costs period (in years)					7 years
Deferred costs not recovering					$ 50