Regulatory Matters (Schedule of Net Carrying Value Of Facilities) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2034 asset	Dec. 31, 2021 USD ($) MW	Dec. 31, 2020 USD ($) MW
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 111,408	$ 106,782
Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		8,386
Remaining net book value		$ 5,917
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 34,122	$ 33,187
Duke Energy Carolinas | Allen Steam Station Unit 1 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		167
Remaining net book value		$ 12
Duke Energy Carolinas | Allen Steam Station Unit 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		259
Remaining net book value		$ 277
Duke Energy Carolinas | Cliffside Unit 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		546
Remaining net book value		$ 365
Duke Energy Carolinas | Allen Steam Station 3 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW			270
Remaining net book value			$ 26
Duke Energy Carolinas | Allen Steam Station 2 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW			167
Remaining net book value			$ 44
Duke Energy Carolinas | Roxboro Unit 4 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW			267
Remaining net book value			$ 170
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 23,657	22,987
Duke Energy Progress | Mayo Unit 1 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		713
Remaining net book value		$ 631
Duke Energy Progress | Roxboro Units 3-4 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,409
Remaining net book value		$ 457
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 18,046	16,563
Duke Energy Florida | Crystal River Units 4 and 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,442
Remaining net book value		$ 1,650
Duke Energy Florida | Crystal River Units 4 and 5 | Generating facilities planned for retirement | Forecast
Public Utilities, General Disclosures [Line Items]
Facilities retiring ahead of schedule | asset	2
Facilities retiring ahead of schedule, years ahead	8 years
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Remaining net book value		$ 11,760	$ 11,721
Duke Energy Indiana | Gibson Units 1 - 5 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		2,845
Remaining net book value		$ 1,829
Duke Energy Indiana | Cayuga Units 1 - 2 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW		1,005
Remaining net book value		$ 696
Duke Energy Indiana | Gallagher Units 2 and 4 | Generating facilities planned for retirement
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW			280
Remaining net book value			$ 102