EARNINGS PER COMMON SHARE AND DIVIDEND PER SHARE - Basic (Details) - shares shares in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Prorata weighted average interest in entity's own common shares (in shares)	6	13

Represents the entity's weighted average interest in its own common shares due to a reciprocal investment.

No definition available.

Name:	enb_WeightedAverageInterestInOwnCommonShares
Namespace Prefix:	enb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration