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Regulatory Matters (Duke Energy Progress Narrative) (Details)									12 Months Ended									24 Months Ended
	Feb. 01, 2026 USD ($)	Nov. 20, 2025	Nov. 11, 2025 USD ($)	Apr. 08, 2025	Feb. 07, 2025 USD ($) MW	Aug. 18, 2023 USD ($)	Apr. 16, 2023	Oct. 06, 2022	Nov. 19, 2027 USD ($)	Aug. 17, 2027 USD ($)	Nov. 19, 2026 USD ($)	Aug. 17, 2026 USD ($)	Dec. 31, 2025 USD ($)	Aug. 17, 2025 USD ($)	Dec. 31, 2024 USD ($)	Aug. 17, 2024 USD ($)	Dec. 31, 2023 USD ($)	Nov. 19, 2027 USD ($)	Jan. 30, 2026 MW	Nov. 21, 2025 MW	Oct. 30, 2025 MW	Sep. 30, 2025 USD ($)	Mar. 31, 2024 MW
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges													$ (4,000,000)		$ 38,000,000		$ 85,000,000
Operation, maintenance and other													6,698,000,000		5,389,000,000		5,625,000,000
Face amount of debt instrument issued													7,005,000,000		7,740,000,000
Total noncurrent regulatory liabilities													15,682,000,000		14,521,000,000
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges													2,000,000		6,000,000		29,000,000
Operation, maintenance and other													1,455,000,000		1,388,000,000		1,379,000,000
Face amount of debt instrument issued													2,561,000,000		677,000,000
Total noncurrent regulatory liabilities													4,807,000,000		4,570,000,000
Duke Energy Progress | Storm Recovery Bonds
Public Utilities, General Disclosures [Line Items]
Face amount of debt instrument issued																						$ 461,000,000
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges													(11,000,000)		31,000,000		44,000,000
Operation, maintenance and other													2,002,000,000		1,740,000,000		$ 1,774,000,000
Face amount of debt instrument issued													2,243,000,000		1,000,000,000
Total noncurrent regulatory liabilities													$ 7,609,000,000		$ 6,592,000,000
Duke Energy Carolinas | Storm Recovery Bonds
Public Utilities, General Disclosures [Line Items]
Face amount of debt instrument issued																						$ 582,000,000
NCUC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Public Utilities, Combined Cycle Plants, in Megawatts | MW																				850			850
PSCSC
Public Utilities, General Disclosures [Line Items]
Public Utilities, Combined Cycle Plants, in Megawatts | MW																					1,365
PSCSC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Public Utilities, Combined Cycle Plants, in Megawatts | MW																					1,170
Nuclear Regulatory Commission
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)													20 years
2022 North Carolina Rate Case | NCUC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Proposed rate period (in years)							3 years	3 years
Approved rate increase (decrease) amount by state commission														$ 126,000,000		$ 233,000,000
Settlement amount						$ 12,200,000,000
MYRP period (in years)						3 years
Approved return on equity (as a percent)						9.80%
Impairment of assets and other charges													$ 28,000,000
Operation, maintenance and other													8,000,000
Requested return on equity (as a percent)		10.95%
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%
Requested return on equity (as a percent)		53.00%
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)									$ 200,000,000		$ 529,000,000							$ 729,000,000
Approved rate increase (decrease) amount by state commission										$ 494,000,000		$ 135,000,000
Requested rate increase (decrease), percent																		15.10%
2022 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Settlement amount						$ 3,500,000,000
Person County Combined Cycle CPCN | NCUC | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)					$ 113,000,000
Public Utilities, Combined Cycle Plants, in Megawatts | MW					1,360
Requested rate increase (decrease), percent					2.60%
Person County Combined Cycle CPCN | NCUC | Duke Energy Progress | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public Utilities, Combined Cycle Plants, in Megawatts | MW																			2,720
Person County Combined Cycle CPCN | NCUC | NCEMC
Public Utilities, General Disclosures [Line Items]
Public Utilities, Combined Cycle Plants, in Megawatts | MW					225
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Storm reserves													100,000,000
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | North Carolina Storms
Public Utilities, General Disclosures [Line Items]
Total noncurrent regulatory liabilities													71,000,000
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Natural Disasters and Other Casualty Events
Public Utilities, General Disclosures [Line Items]
Storm reserves													200,000,000
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | North Carolina Storms
Public Utilities, General Disclosures [Line Items]
Total noncurrent regulatory liabilities													$ 136,000,000
2025 South Carolina Rate Case | PSCSC | Duke Energy Progress | Forecast | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission	$ 40,000,000
Approved return on equity (as a percent)	9.99%
Approved capital structure (as a percent)	53.00%
2025 South Carolina Rate Case | PSCSC | Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission			$ 19,000,000
Approved return on equity (as a percent)			9.99%
Approved capital structure (as a percent)			53.00%
Robinson Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)				20 years

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