Debt and Credit Facilities (Summary of Debt Issuances) (Details)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt issuances	$ 7,686,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	$ 3,249,000,000		$ 3,387,000,000
5.050% May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.05%	5.05%
Debt issuances	$ 400,000,000
June 2022 4.750% Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.75%	4.75%
Debt issuances	$ 645,000,000
June 2022 5.306% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.306%	5.306%
Debt issuances	$ 537,000,000
August 2022 4.300% Notes Due March 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.30%	4.30%
Debt issuances	$ 900,000,000
August 2022 4.500% Notes Due August 2032 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.50%	4.50%
Debt issuances	$ 1,150,000,000
August 2022 5.000% Notes Due August 2052 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.00%	5.00%
Debt issuances	$ 1,150,000,000
2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	2.85%	2.85%
Debt issuances	$ 500,000,000
3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.55%	3.55%
Debt issuances	$ 650,000,000
3.400% March 2022 Notes Due April 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.40%	3.40%
Debt issuances	$ 500,000,000
4.000% March 2022 Notes Due April 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	4.00%	4.00%
Debt issuances	$ 400,000,000
June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Interest Rate	4.00%	4.00%
Debt issuances	$ 168,000,000
June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Interest Rate	4.25%	4.25%
Debt issuances	$ 234,000,000
September 2022 3.300% Notes Due October 2046
Debt Instrument [Line Items]
Interest Rate	3.30%	3.30%
Debt issuances	$ 200,000,000
September 2022 3.700% Notes Due October 2046
Debt Instrument [Line Items]
Interest Rate	3.70%	3.70%
Debt issuances	$ 210,000,000
September 2022 4.000% Notes Due October 2046
Debt Instrument [Line Items]
Interest Rate	4.00%	4.00%
Debt issuances	$ 42,000,000
Duke Energy (Parent)
Debt Instrument [Line Items]
Debt issuances	4,784,000,000
Duke Energy (Parent) | June 2022 4.750% Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	645,000,000
Duke Energy (Parent) | June 2022 5.306% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	537,000,000
Duke Energy (Parent) | August 2022 4.300% Notes Due March 2028 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	900,000,000
Duke Energy (Parent) | August 2022 4.500% Notes Due August 2032 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Duke Energy (Parent) | August 2022 5.000% Notes Due August 2052 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Duke Energy (Parent) | June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Debt issuances	168,000,000
Duke Energy (Parent) | June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Debt issuances	$ 234,000,000
Duke Energy (Parent) | Senior Notes, 3.10% Due June 2028
Debt Instrument [Line Items]
Interest Rate	3.10%	3.10%
Debt issuances | €		€ 600,000,000
Duke Energy (Parent) | Senior Notes, 3.85% Due June 2034
Debt Instrument [Line Items]
Interest Rate	3.85%	3.85%
Debt issuances | €		€ 500,000,000
Duke Energy (Parent) | Debt Maturing August 2022, 2.400% interest rate | Unsecured Debt
Debt Instrument [Line Items]
Current maturities of long-term debt (includes amounts related to VIEs)	$ 500,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	1,019,000,000		362,000,000
Duke Energy Carolinas | 2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas | 3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	650,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	1,352,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	368,000,000		$ 556,000,000
Duke Energy Progress | 3.400% March 2022 Notes Due April 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | 4.000% March 2022 Notes Due April 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	400,000,000
Duke Energy Progress | September 2022 3.300% Notes Due October 2046
Debt Instrument [Line Items]
Debt issuances	200,000,000
Duke Energy Progress | September 2022 3.700% Notes Due October 2046
Debt Instrument [Line Items]
Debt issuances	210,000,000
Duke Energy Progress | September 2022 4.000% Notes Due October 2046
Debt Instrument [Line Items]
Debt issuances	42,000,000
Piedmont
Debt Instrument [Line Items]
Debt issuances	400,000,000
Piedmont | 5.050% May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	$ 400,000,000