Percentage of additional interest acquired in projects under the terms of a joint funding agreement.

No definition available.

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- Definition

Represents the capacity in megawatts of the wind project acquired.

+ References

No definition available.

+ Details

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- Definition

The distance off shore of the wind project.

+ References

No definition available.

+ Details

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- Definition

This element represents the estimated aggregate cost of the final total investment accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

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- Definition

Initial capacity of the pipeline to deliver crude oil.

+ References

No definition available.

+ Details

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- Definition

Length of 30-inch diameter pipeline.

+ References

No definition available.

+ Details

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- Definition

Length of converted 24-inch diameter pipeline.

+ References

No definition available.

+ Details

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- Definition

Length of converted 30-inch diameter pipeline.

+ References

No definition available.

+ Details

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- Definition

Length of new 30-inch diameter pipeline.

+ References

No definition available.

+ Details

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- Definition

The percentage interest in the project that the entity has the option to acquire once the project is completed and in service.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Cash outflow to acquire additional interest in projects under the terms of a joint funding agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Period of revenue support by government.

+ References

No definition available.

+ Details

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- Definition

The capacity for delivery of crude oil to which the pipeline has the potential to be expanded.

+ References

No definition available.

+ Details

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Data Type:	us-types:flowItemType
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- Definition

The percentage of project development and construction costs for which the entity is responsible per the terms of an agreement.

+ References

No definition available.

+ Details

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- Definition

Amount of reimbursement paid to date for capital expenditures on the project.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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-Paragraph 7
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-Section 30
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- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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SUBSEQUENT EVENTS (Details) - Subsequent Event € in Millions, $ in Millions, CAD in Billions						3 Months Ended	12 Months Ended
	Feb. 17, 2017 EUR (€)	Feb. 17, 2017 EUR (€) mi	Feb. 17, 2017 EUR (€) km	Feb. 17, 2017 EUR (€) MW	Jan. 27, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 CAD	Feb. 17, 2017 CAD	Feb. 15, 2017 bbl / d	Feb. 15, 2017 mi	Feb. 15, 2017 km	Feb. 15, 2017 USD ($)	Feb. 15, 2017
Joint funding of Line 3 Replacement Program
SUBSEQUENT EVENTS
Project development and construction costs (as a percent)					99.00%
Reimbursement for capital expenditures on project					$ 450
Enbridge Energy Partners, L.P. \| Joint funding of Line 3 Replacement Program
SUBSEQUENT EVENTS
Project development and construction costs (as a percent)					1.00%
Option to acquire interest in completed project (as a percent)					40.00%
Enbridge Energy Partners, L.P. \| Joint funding of Eastern Access projects
SUBSEQUENT EVENTS
Additional interest acquired in project (as a percent)					15.00%
Amount paid to acquire additional interest in projects					$ 360
Midcoast Energy Partners, L.P. \| Forecast
SUBSEQUENT EVENTS
Purchase price						$ 170
Hohe See Offshore Wind Project
SUBSEQUENT EVENTS
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%					50.00%
Wind project capacity \| MW				497
Distance off the shore from the coast of Germany		61	98
Period of revenue support by government	20 years
Estimated total amount of investment	€ 1,070	€ 1,070	€ 1,070	€ 1,070					CAD 1.7
Hohe See Offshore Wind Project \| Forecast
SUBSEQUENT EVENTS
Planned spend							€ 440	CAD 0.6
Bakken Pipeline System
SUBSEQUENT EVENTS
Ownership interest (as a percent)														27.60%
Purchase price													$ 1,500
Bakken Pipeline System \| Dakota Access Pipeline project
SUBSEQUENT EVENTS
Length of 30-inch pipeline											1,172	1,886
Potential expanded capacity to deliver crude oil (in bpd) \| bbl / d										570,000
Bakken Pipeline System \| Dakota Access Pipeline project \| Minimum
SUBSEQUENT EVENTS
Initial capacity to deliver crude oil (in bpd) \| bbl / d										470,000
Bakken Pipeline System \| Energy Transfer Crude Oil Pipeline project
SUBSEQUENT EVENTS
Length of new 30-inch diameter pipe											62	100
Length of converted 30-inch diameter pipe											686	1,104
Length of converted 24-inch diameter pipe											40	64