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Income Taxes (Income Taxes Paid) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	$ 58
Transferrable Credits – purchased/(sold)	(676)
Total Federal	(618)
Total State	(7)
Total Income Taxes Paid (net of refunds)	(625)	$ (400)	$ 1
North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	(4)
South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	1
Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	(4)
Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Carolinas
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	561
Transferrable Credits – purchased/(sold)	(551)
Total Federal	10
Total State	75
Total Income Taxes Paid (net of refunds)	85	(85)	151
Duke Energy Carolinas | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	39
Duke Energy Carolinas | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	36
Duke Energy Carolinas | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Carolinas | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Carolinas | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Carolinas | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Carolinas | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Progress Energy
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	424
Transferrable Credits – purchased/(sold)	(171)
Total Federal	253
Total State	12
Total Income Taxes Paid (net of refunds)	265	315	310
Progress Energy | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	7
Progress Energy | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Progress Energy | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	5
Progress Energy | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Progress Energy | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Progress Energy | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Progress Energy | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Progress
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	211
Transferrable Credits – purchased/(sold)	(102)
Total Federal	109
Total State	11
Total Income Taxes Paid (net of refunds)	120	192	73
Duke Energy Progress | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	9
Duke Energy Progress | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	2
Duke Energy Progress | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Progress | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Progress | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Progress | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Progress | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	202
Transferrable Credits – purchased/(sold)	(69)
Total Federal	133
Total State	34
Total Income Taxes Paid (net of refunds)	167	270	219
Duke Energy Florida | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	34
Duke Energy Florida | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Florida | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	100
Transferrable Credits – purchased/(sold)	0
Total Federal	100
Total State	3
Total Income Taxes Paid (net of refunds)	103	(79)	58
Duke Energy Ohio | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	3
Duke Energy Ohio | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Ohio | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	182
Transferrable Credits – purchased/(sold)	0
Total Federal	182
Total State	26
Total Income Taxes Paid (net of refunds)	208	(80)	90
Duke Energy Indiana | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	26
Duke Energy Indiana | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Duke Energy Indiana | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont
Effective Income Tax Rate Reconciliation [Line Items]
Internal Revenue Service – payments/(refunds)	55
Transferrable Credits – purchased/(sold)	0
Total Federal	55
Total State	0
Total Income Taxes Paid (net of refunds)	55	$ 48	$ 28
Piedmont | North Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | South Carolina
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | Florida
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | Indiana
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | Kentucky
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | Oklahoma
Effective Income Tax Rate Reconciliation [Line Items]
Total State	0
Piedmont | Other
Effective Income Tax Rate Reconciliation [Line Items]
Total State	$ 0

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