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EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Basic (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Prorata weighted average interest in entity's own common shares (in shares)	3	6

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- Definition

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

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_EarningsPerShareAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration