| Document and Entity Information | Mar. 20, 2020 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | ENBRIDGE INC |
| Amendment Flag | false |
| Entity Central Index Key | 0000895728 |
| Document Type | 8-K |
| Document Period End Date | Mar. 20, 2020 |
| Entity Incorporation State Country Code | Z4 |
| Entity File Number | 001-15254 |
| Entity Tax Identification Number | 98-0377957 |
| Entity Address, Address Line One | 200 |
| Entity Address, Address Line Two | 425 - 1st Street S.W. |
| Entity Address, Address Line Three | Calgary |
| Entity Address, City or Town | Alberta |
| Entity Address, State or Province | AB |
| Entity Address, Country | CA |
| Entity Address, Postal Zip Code | T2P 3L8 |
| City Area Code | 1-403 |
| Local Phone Number | 231-3900 |
| 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 And Entity Information [Line Items] | |
| Security 12b Title | Common Shares |
| Trading Symbol | ENB |
| Security Exchange Name | NYSE |
| A 6375 Fixed To Floating Rate Subordinated Notes Series 2018 B Due 2078 [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.375% Fixed-to-Floating Rate Subordinated Notes Series 2018-B due 2078 |
| Trading Symbol | ENBA |
| Security Exchange Name | NYSE |
