Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 3,330	$ 3,878
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 330
Duke Energy (Parent) \| Debt Maturing April 2023, 2.875% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	2.875%
Current maturities of long-term debt	$ 350
Duke Energy (Parent) \| Debt Maturing June 2023, 2.048% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.631%
Current maturities of long-term debt	$ 500
Duke Energy (Parent) \| Debt Maturing October 2023, 3.950% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	3.95%
Current maturities of long-term debt	$ 400
Duke Energy (Parent) \| Debt Maturing March 2024, 5.385% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.385%
Current maturities of long-term debt	$ 1,000
Duke Energy Ohio
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 475	475
Duke Energy Ohio \| Debt Maturing October 2023, 4.879% Coupon \| Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.879%
Current maturities of long-term debt	$ 150
Duke Energy Ohio \| Debt Maturing September 2023, 3.800% Coupon \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.80%
Current maturities of long-term debt	$ 300
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt	18	1,018
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 370	$ 369
Duke Energy Progress \| Debt Maturing September 2023, 3.375% Coupon \| First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.375%
Current maturities of long-term debt	$ 300

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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