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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details) - Duke Energy Progress $ in Millions						1 Months Ended		12 Months Ended			36 Months Ended
	Feb. 01, 2026 USD ($)	Jun. 12, 2025 USD ($)	Apr. 08, 2025	Feb. 07, 2025 USD ($) MW	Aug. 18, 2023 USD ($)	Apr. 30, 2023	Oct. 31, 2022	Aug. 17, 2026 USD ($)	Aug. 17, 2025 USD ($)	Aug. 17, 2024 USD ($)	Aug. 17, 2026 USD ($)
2022 North Carolina Rate Case | NCUC
Public Utilities, General Disclosures [Line Items]
Settlement rate, period (in years)					3 years		3 years
Proposed rate period (in years)						3 years
Approved rate increase (decrease), amount									$ 126	$ 233
Settlement rate, amount					$ 12,200
Approved return on equity percentage (as a percent)					9.80%
Approved equity capital structure, percentage (as a percent)					53.00%
2022 North Carolina Rate Case | NCUC | Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount								$ 135			$ 494
2022 North Carolina Rate Case, Retail Allocated | NCUC
Public Utilities, General Disclosures [Line Items]
Settlement rate, amount					$ 3,500
Person County Cycle CPCN Proceeding | NCUC
Public Utilities, General Disclosures [Line Items]
Generation capacity (MW) | MW				1,360
Generation capacity, co-owned (MW) | MW				225
Requested rate increase (decrease), amount				$ 113
Requested rate increase (decrease) (as a percent)				2.60%
Robinson Subsequent License Renewal | NRC
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
2025 South Carolina Rate Case | PSCSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 75
Requested rate increase (decrease) (as a percent)		12.10%
Requested return on equity (as a percent)		10.85%
Equity ratio (as a percent)		53.00%
2025 South Carolina Rate Case | PSCSC | Forecast | Subsequent event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease), amount	$ 40
Approved return on equity percentage (as a percent)	9.99%
Approved equity capital structure, percentage (as a percent)	53.00%

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