Debt and Credit Facilities (Narrative) (Details)				1 Months Ended				12 Months Ended
	Jan. 05, 2024 USD ($)	Jun. 30, 2023 day	Apr. 03, 2023	Apr. 30, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($) $ / shares	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) $ / shares	Jan. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Debt Instrument [Line Items]
Debt issuances					$ 9,186,000,000			$ 9,825,000,000
Common stock, par value (in usd per share) | $ / shares					$ 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					$ 897,000,000			$ 985,000,000
Current maturities of long-term debt					3,878,000,000			2,800,000,000
Other loans outstanding against cash surrender value of life insurance policies					852,000,000			$ 873,000,000
Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 9,000,000,000		$ 9,000,000,000
Letters of Credit Outstanding, Amount								39,000,000
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Term (in years)						3 years	3 years
January 2024 Senior Unsecured Notes | Unsecured Debt | Subsequent Event
Debt Instrument [Line Items]
Debt issuances									$ 1,250,000,000
January 2024 Senior Unsecured Notes, Three Year Tranche | Unsecured Debt | Subsequent Event
Debt Instrument [Line Items]
Debt issuances	$ 600,000,000
Term (in years)	3 years
January 2024 Senior Unsecured Notes, Five Year Tranche | Unsecured Debt | Subsequent Event
Debt Instrument [Line Items]
Debt issuances	$ 650,000,000
Term (in years)	5 years
Interest rate (as a percent)	4.85%
Variable Rate Term Loan Due March 2024 | Secured Debt | Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 1,000,000,000
4.25% Convertible Senior notes Due April 2026
Debt Instrument [Line Items]
Interest rate (as a percent)				4.125%
4.25% Convertible Senior notes Due April 2026 | Convertible Debt | Debt Conversion Terms One
Debt Instrument [Line Items]
Trading days (in days) | day		20
Consecutive trading days (in days) | day		30
Debt conversion rate (as a percent)		130.00%
4.25% Convertible Senior notes Due April 2026 | Convertible Debt | Debt Conversion Terms Two
Debt Instrument [Line Items]
Trading days (in days) | day		5
Consecutive trading days (in days) | day		10
Debt conversion rate (as a percent)		98.00%
Term Loan Due April 2024
Debt Instrument [Line Items]
Repayments of debt								800,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances					1,150,000,000			2,650,000,000
Current maturities of long-term debt					1,018,000,000			$ 19,000,000
Duke Energy Carolinas | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Duke Energy Carolinas | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 1,575,000,000
Letters of Credit Outstanding, Amount								4,000,000
Duke Energy Carolinas | January 2024 Notes | First Mortgage Bonds | Subsequent Event
Debt Instrument [Line Items]
Debt issuances	1,000,000,000
Duke Energy Carolinas | January 2024 Notes At 4.95% | First Mortgage Bonds | Subsequent Event
Debt Instrument [Line Items]
Debt issuances	$ 575,000,000
Term (in years)	10 years
Interest rate (as a percent)	4.85%
Duke Energy Carolinas | January 2024 Notes At 5.340% | First Mortgage Bonds | Subsequent Event
Debt Instrument [Line Items]
Debt issuances	$ 425,000,000
Term (in years)	30 years
Interest rate (as a percent)	5.40%
Parent
Debt Instrument [Line Items]
Debt issuances								3,075,000,000
Parent | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of debt					400,000,000
Facility size							$ 1,400,000,000
Parent | Line of Credit | Subsequent Event | Revolving Credit Facility
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount									$ 1,000,000,000
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
Duke Energy Florida
Debt Instrument [Line Items]
Debt issuances					500,000,000			1,500,000,000
Current maturities of long-term debt					$ 328,000,000			$ 589,000,000
Duke Energy Florida | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Duke Energy Florida | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 950,000,000
Letters of Credit Outstanding, Amount								$ 7,000,000
Progress Energy
Debt Instrument [Line Items]
Common stock, par value (in usd per share) | $ / shares					$ 0.01			$ 0.01
Current maturities of long-term debt					$ 697,000,000			$ 661,000,000
Progress Energy | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Progress Energy | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size							$ 2,500,000,000
Duke Energy Ohio
Debt Instrument [Line Items]
Debt issuances								$ 750,000,000
Common stock, par value (in usd per share) | $ / shares					$ 8.50			$ 8.50
Current maturities of long-term debt					$ 475,000,000
Duke Energy Ohio | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Duke Energy Ohio | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 1,050,000,000
Duke Energy Indiana
Debt Instrument [Line Items]
Debt issuances								500,000,000
Current maturities of long-term debt					303,000,000			$ 4,000,000
Duke Energy Indiana | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Duke Energy Indiana | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 950,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances					1,352,000,000			1,000,000,000
Current maturities of long-term debt					369,000,000			72,000,000
Other loans outstanding against cash surrender value of life insurance policies					33,000,000			$ 32,000,000
Duke Energy Progress | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.65
Duke Energy Progress | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 1,400,000,000
Letters of Credit Outstanding, Amount								1,000,000
Piedmont
Debt Instrument [Line Items]
Debt issuances					$ 400,000,000			$ 350,000,000
Common stock, par value (in usd per share) | $ / shares					$ 0			$ 0
Current maturities of long-term debt					$ 45,000,000			$ 40,000,000
Piedmont | Maximum
Debt Instrument [Line Items]
Debt to total capitalization percentage, for each borrower								0.70
Piedmont | Revolving Credit Facility
Debt Instrument [Line Items]
Facility size								$ 800,000,000