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Regulatory Matters (Duke Energy Ohio Narrative) (Details) - USD ($) $ in Millions									12 Months Ended									24 Months Ended
	Jan. 03, 2026	Nov. 20, 2025	Oct. 02, 2025	Dec. 02, 2024	May 15, 2024	Oct. 12, 2023	Aug. 18, 2023	Apr. 28, 2023	Nov. 19, 2027	Aug. 17, 2027	Nov. 19, 2026	Aug. 17, 2026	Dec. 31, 2025	Aug. 17, 2025	Dec. 31, 2024	Aug. 17, 2024	Dec. 31, 2023	Nov. 19, 2027
Public Utilities, General Disclosures [Line Items]
Operating Revenues													$ 32,237		$ 30,357		$ 29,060
Operation, maintenance and other													6,698		5,389		5,625
Income tax expense (benefit)													(642)		(590)		(438)
Public utilities, property, plant and equipment, net													129,959		121,626
Impairment of assets and other charges													4		(38)		(85)
Regulatory assets													16,313		16,959
Less: Current portion													1,271		1,421
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Operating Revenues													2,797		2,545		2,507
Operation, maintenance and other													490		485		478
Income tax expense (benefit)													(68)		(64)		(63)
Public utilities, property, plant and equipment, net													10,815		10,244
Impairment of assets and other charges													0		0		(3)
Regulatory assets													772		793
Less: Current portion													57		34
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)								$ 32
Requested return on equity (as a percent)								9.60%
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | Public Utilities Commission Of Ohio | Maximum
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)								52.32%
Duke Energy Ohio | Duke Energy Kentucky Electric Base Rate Case | KPSC
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission						$ 48
Duke Energy Ohio | Duke Energy Kentucky Electric Base Rate Case | KPSC | Maximum
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)						52.145%
Duke Energy Ohio | Duke Energy Kentucky Electric Base Rate Case, Electric Base Rates | KPSC
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						9.75%
Duke Energy Ohio | Duke Energy Kentucky Electric Base Rate Case, Electric Riders | KPSC
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)						9.65%
Duke Energy Ohio | Duke Energy Ohio Energy Security Plan | Public Utilities Commission Of Ohio
Public Utilities, General Disclosures [Line Items]
MYRP period (in years)					3 years
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Operating Revenues													7,386		7,017		6,488
Operation, maintenance and other													1,455		1,388		1,379
Income tax expense (benefit)													(223)		(189)		(149)
Public utilities, property, plant and equipment, net													28,195		26,130
Impairment of assets and other charges													(2)		(6)		$ (29)
Regulatory assets													5,195		5,181
Less: Current portion													274		$ 348
Duke Energy Progress | 2022 North Carolina Rate Case | NCUC
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)		10.95%
Approved rate increase (decrease) amount by state commission														$ 126		$ 233
Approved return on equity (as a percent)							9.80%
Operation, maintenance and other													8
Impairment of assets and other charges													$ (28)
MYRP period (in years)							3 years
Duke Energy Progress | 2022 North Carolina Rate Case | NCUC | Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)									$ 200		$ 529							$ 729
Approved rate increase (decrease) amount by state commission										$ 494		$ 135
Duke Energy Progress | 2022 North Carolina Rate Case | NCUC | Equity
Public Utilities, General Disclosures [Line Items]
Requested return on equity (as a percent)		53.00%
Approved return on equity (as a percent)							53.00%
Duke Energy Kentucky | Duke Energy Kentucky Electric Base Rate Case | Kentucky Public Service Commission (KPSC)
Public Utilities, General Disclosures [Line Items]
Equity ratio (as a percent)			52.73%
Duke Energy Kentucky | Duke Energy Kentucky Electric Base Rate Case, Electric Base Rates | Kentucky Public Service Commission (KPSC)
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)			9.80%
Duke Energy Kentucky | Duke Energy Kentucky 2024 Electric Base Rate Case | KPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease)				$ 70
Duke Energy Kentucky | Duke Energy Kentucky 2025 Natural Gas Base Rate Case | Kentucky Public Service Commission (KPSC)
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission			$ 44
Duke Energy Kentucky | Duke Energy Kentucky 2025 Natural Gas Base Rate Case | Kentucky Public Service Commission (KPSC) | Forecast | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) amount by state commission	$ 22
Approved return on equity (as a percent)	9.80%
Equity ratio (as a percent)	52.649%
Duke Energy Kentucky | Duke Energy Kentucky 2025 Natural Gas Base Rate Case, Riders | Kentucky Public Service Commission (KPSC) | Forecast | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)	9.70%

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