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Debt and Credit Facilities (Narrative) (Details)			1 Months Ended											2 Months Ended	3 Months Ended		5 Months Ended
	Nov. 07, 2024 USD ($)	Apr. 03, 2023	Jan. 31, 2026 USD ($)	Dec. 31, 2025 USD ($) $ / shares	Oct. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Aug. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Apr. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jan. 31, 2024 USD ($)	Apr. 30, 2023 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) $ / shares	Mar. 31, 2025 USD ($)	Feb. 28, 2025 USD ($)	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Debt issuances				$ 7,005,000,000										$ 7,740,000,000			$ 7,005,000,000
Repayments of debt				$ 500,000,000	$ 95,000,000	$ 650,000,000		$ 150,000,000
Common stock, par value (in usd per share) | $ / shares				$ 0.001										$ 0.001			$ 0.001
Demand notes, maximum amount available for sale													$ 4,000,000,000
Demand notes, maximum amount outstanding													$ 2,000,000,000
Principal amount of demand notes				$ 1,110,000,000										$ 1,070,000,000			$ 1,110,000,000
Current maturities of long-term debt				7,104,000,000										4,349,000,000			7,104,000,000
Other loans outstanding against cash surrender value of life insurance policies				$ 935,000,000										903,000,000			$ 935,000,000
Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 10,000,000,000													$ 10,000,000,000	$ 10,000,000,000	$ 9,000,000,000
Letters of Credit Outstanding, Amount				7,000,000													7,000,000
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Term (in years)													3 years
Subsequent Event
Debt Instrument [Line Items]
Repayments of debt			$ 45,000,000
4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Interest rate (as a percent)												4.125%
Duke Energy Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Term (in years)	2 years
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances				2,243,000,000										1,000,000,000			2,243,000,000
Current maturities of long-term debt				$ 629,000,000										521,000,000			$ 629,000,000
Duke Energy Carolinas | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Carolinas | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 1,650,000,000													$ 1,650,000,000
Letters of Credit Outstanding, Amount				4,000,000													4,000,000
Duke Energy Carolinas | Duke Energy Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Facility size	$ 700,000,000
Drawings on credit facility														455,000,000
Parent
Debt Instrument [Line Items]
Debt issuances				1,750,000,000										4,565,000,000			1,750,000,000
Parent | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of debt											$ 1,000,000,000
Facility size																				$ 1,400,000,000
Parent | 4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Debt issuances												$ 1,700,000,000
Debt conversion rate (as a percent)		25.00%
Common stock, par value (in usd per share) | $ / shares												$ 0.001
Conversion ratio												0.0084131
Parent | Duke Energy Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Term (in years)										364 days
Repayments of debt																$ 500,000,000
Facility size										$ 700,000,000
Drawings on credit facility									$ 500,000,000
Parent | Delayed Draw Term Loan Facility | Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Term (in years)						364 days
Facility size						$ 2,000,000,000									$ 2,000,000,000
Drawings on credit facility						$ 2,000,000,000.0
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances				1,100,000,000										173,000,000			1,100,000,000
Current maturities of long-term debt				$ 437,000,000										534,000,000			$ 437,000,000
Duke Energy Florida | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Florida | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 700,000,000													$ 700,000,000
Duke Energy Florida | Duke Energy Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Term (in years)	364 days
Facility size	$ 800,000,000
Drawings on credit facility														$ 100,000,000
Duke Energy Florida | Duke Energy Term Loan Facility | Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Repayments of debt					$ 350,000,000										$ 450,000,000
Progress Energy
Debt Instrument [Line Items]
Common stock, par value (in usd per share) | $ / shares				$ 0.01										$ 0.01			$ 0.01
Current maturities of long-term debt				$ 722,000,000										$ 1,517,000,000			$ 722,000,000
Progress Energy | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Ohio
Debt Instrument [Line Items]
Debt issuances				$ 501,000,000										$ 650,000,000			$ 501,000,000
Common stock, par value (in usd per share) | $ / shares				$ 8.50										$ 8.50			$ 8.50
Current maturities of long-term debt				$ 45,000,000										$ 245,000,000			$ 45,000,000
Duke Energy Ohio | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Ohio | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 700,000,000													$ 700,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Debt issuances				300,000,000										300,000,000			300,000,000
Current maturities of long-term debt				$ 4,000,000										4,000,000			$ 4,000,000
Duke Energy Indiana | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Indiana | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 850,000,000													$ 850,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances				2,561,000,000										677,000,000			2,561,000,000
Current maturities of long-term debt				285,000,000										983,000,000			285,000,000
Other loans outstanding against cash surrender value of life insurance policies				$ 31,000,000										32,000,000			$ 31,000,000
Duke Energy Progress | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.65													0.65
Duke Energy Progress | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 1,675,000,000													$ 1,675,000,000
Letters of Credit Outstanding, Amount				$ 1,000,000													$ 1,000,000
Duke Energy Progress | Duke Energy Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Facility size	$ 250,000,000
Drawings on credit facility														185,000,000
Piedmont
Debt Instrument [Line Items]
Debt issuances														$ 375,000,000
Common stock, par value (in usd per share) | $ / shares				$ 0										$ 0			$ 0
Current maturities of long-term debt				$ 490,000,000										$ 205,000,000			$ 490,000,000
Piedmont | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower				0.70													0.70
Piedmont | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size				$ 1,000,000,000													$ 1,000,000,000
Piedmont | Term Loan Facility Maturing August 2026 | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (as a percent)				4.611%													4.611%
Current maturities of long-term debt				$ 450,000,000													$ 450,000,000
Piedmont | Term Loan Facility Maturing August 2026 | Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Term (in years)							364 days
Repayments of debt																	150,000,000
Facility size							$ 450,000,000
Drawings on credit facility																	$ 450,000,000

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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