| Cover | Sep. 09, 2019 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 9, 2019 |
| Entity File Number | 001-32853 |
| Entity Registrant Name | Duke Energy Corporation |
| Entity Central Index Key | 0001326160 |
| Entity Tax Identification Number | 20-2777218 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 550 South Tryon Street |
| Entity Address, City or Town | Charlotte |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28202 |
| City Area Code | 704 |
| Local Phone Number | 382-3853 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | DUK |
| Security Exchange Name | NYSE |
| Junior Subordinated Debentures 5.125% Coupon Due January 2073 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 5.125% Junior Subordinated Debentures due January 15, 2073 |
| Trading Symbol | DUKH |
| Security Exchange Name | NYSE |
| Junior Subordinated Debentures 5.625% Coupon Due September 2078 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 5.625% Junior Subordinated Debentures due September 15, 2078 |
| Trading Symbol | DUKB |
| Security Exchange Name | NYSE |
| Depository Share [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares |
| Trading Symbol | DUK PR A |
| Security Exchange Name | NYSE |
