Represents the percentage of workforce reduction made by the Company.

No definition available.

Name:	enb_PercentOfWorkforceReduction
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement.

+ References

No definition available.

+ Details

Name:	enb_SeveranceCostIncurred
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash paid for special or contractual termination benefits incurred during the period, provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan.

+ References

No definition available.

+ Details

Name:	enb_SeveranceCostsIncurredAndPaid
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	enb_SeveranceCostsLineItems
Namespace Prefix:	enb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of special or contractual termination benefits payable provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan.

+ References

No definition available.

+ Details

Name:	enb_SeveranceCostsPayableCurrent
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_BalanceSheetLocationAxis=enb_AccountsPayableAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=enb_OperatingAndAdministrativeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OtherNonoperatingIncomeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SEVERANCE COSTS (Details) - CAD CAD in Millions	1 Months Ended		12 Months Ended
SEVERANCE COSTS (Details) - CAD CAD in Millions	Oct. 31, 2016	Nov. 30, 2015	Dec. 31, 2016	Dec. 31, 2015
SEVERANCE COSTS
Percent of workforce reduction	5.00%	5.00%
Current period severance costs paid			CAD 29	CAD 22
Accounts payable and other
SEVERANCE COSTS
Severance costs payable			25	24
Operating and administrative expense
SEVERANCE COSTS
Severance expense			54	42
Other income/(expense)
SEVERANCE COSTS
Severance expense			CAD 0	CAD 4