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COMMITMENTS AND CONTINGENCIES (Details) CAD in Millions, $ in Millions |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 07, 2012 | Jul. 27, 2012 bbl | Sep. 09, 2010 bbl | Jul. 26, 2010 bbl | Jul. 26, 2010 mi | Jul. 26, 2010 km | Jun. 30, 2015 USD ($) a | May. 31, 2015 USD ($) a | Dec. 31, 2015 USD ($) item | Dec. 31, 2015 CAD | Dec. 31, 2014 USD ($) item | Dec. 31, 2013 | Dec. 31, 2015 CAD item | Dec. 31, 2014 CAD item | Apr. 30, 2011 USD ($)
Purchase obligation of services, pipe and other materials, including transportation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  | CAD 14,025 |  |
Less than 1 year |  |  |  |  |  |  |  |  |  |  |  |  | 5,459 |  |
2 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,918 |  |
3 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,205 |  |
4 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,118 |  |
5 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,025 |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  | 3,300 |  |
Minimum future payments under capital and operating leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  | 739 |  |
Less than 1 year |  |  |  |  |  |  |  |  |  |  |  |  | 110 |  |
2 years |  |  |  |  |  |  |  |  |  |  |  |  | 103 |  |
3 years |  |  |  |  |  |  |  |  |  |  |  |  | 60 |  |
4 years |  |  |  |  |  |  |  |  |  |  |  |  | 56 |  |
5 years |  |  |  |  |  |  |  |  |  |  |  |  | 51 |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  | 359 |  |
Maintenance obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  | 420 |  |
Less than 1 year |  |  |  |  |  |  |  |  |  |  |  |  | 46 |  |
2 years |  |  |  |  |  |  |  |  |  |  |  |  | 46 |  |
3 years |  |  |  |  |  |  |  |  |  |  |  |  | 31 |  |
4 years |  |  |  |  |  |  |  |  |  |  |  |  | 25 |  |
5 years |  |  |  |  |  |  |  |  |  |  |  |  | 19 |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  | 253 |  |
Minimum future payments under land leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  | 363 |  |
Less than 1 year |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
2 years |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
3 years |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
4 years |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
5 years |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  | 298 |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  | 15,547 |  |
Total Less than 1 year |  |  |  |  |  |  |  |  |  |  |  |  | 5,628 |  |
Total 2 years |  |  |  |  |  |  |  |  |  |  |  |  | 2,080 |  |
Total 3 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,309 |  |
Total 4 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,212 |  |
Total 5 years |  |  |  |  |  |  |  |  |  |  |  |  | 1,108 |  |
Total thereafter |  |  |  |  |  |  |  |  |  |  |  |  | 4,210 |  |
Environmental liabilities |  |  |  |  |  |  |  |  |  |  |  |  | CAD 141 | CAD 161 |
Aggregate limited amount for pollution liability under insurance program | $ |  |  |  |  |  |  |  |  | $ 860 |  |  |  |  |  |
Enbridge Energy Partners, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest ownership percentage |  |  |  |  |  |  |  |  | 35.70% |  | 33.70% | 20.60% | 35.70% | 33.70% |
Environmental Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated negotiated amount | $ |  |  |  |  |  |  | $ 4 |  |  |  |  |  |  |  |
Loss Contingencies Restoration Land Area | a |  |  |  |  |  |  | 175 |  |  |  |  |  |  |  |
Lakehead System Line 14 Crude Oil Release |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental liabilities |  |  |  |  |  |  |  |  |  |  |  |  | CAD 0 |  |
Lakehead System Line 14 Crude Oil Release | Enbridge Energy Partners, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated volume of oil released (in barrels) | bbl |  | 1,700 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of pressure prior to the incident up to which operating pressure was restricted by PHMSA | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period for Which Operating Pressure Restrictions are Removed by Pipeline and Hazardous Materials Safety Administration |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |
Line 6B Crude Oil Release |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | CAD 193 |  |
Amount of insurance claim recognized, net of tax |  |  |  |  |  |  |  |  |  | CAD 80 |  |  |  |  |
Line 6B Crude Oil Release | Enbridge Energy Partners, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated volume of oil released (in barrels) | bbl |  |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |
Estimated cost | $ |  |  |  |  |  |  |  |  | $ 1,200 |  |  |  |  |  |
Area affected by released crude oil |  |  |  |  | 38 | 61 |  |  |  |  |  |  |  |  |
Loss Contingencies Minimum Area Of Wetlands Provided Through Restoration Settlement | a |  |  |  |  |  |  |  | 300 |  |  |  |  |  |  |
Loss Contingencies Payment Amount For Mitigation Impacts To Banks And Bottomlands And Watershed | $ |  |  |  |  |  |  |  | $ 5 |  |  |  |  |  |  |
Increase in estimated cost | $ |  |  |  |  |  |  |  |  |  |  | $ 86 |  |  |  |
Aggregate limited amount for pollution liability under insurance program | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 650
Amount of insurance claim recognized | $ |  |  |  |  |  |  |  |  | 547 |  |  |  |  |  |
Expected insurance recovery | $ |  |  |  |  |  |  |  |  | $ 650 |  |  |  |  |  |
Number of actions or claims filed | item |  |  |  |  |  |  |  |  | 5 |  |  |  | 5 |  |
Estimated fine or penalty amount | $ |  |  |  |  |  |  |  |  | $ 44 |  |  |  |  |  |
Civil penalty | $ |  |  |  |  |  |  |  |  | $ 40 |  |  |  |  |  |
Line 6A Crude Oil Release |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated cost | $ |  |  |  |  |  |  |  |  |  |  | $ 51 |  |  |  |
Estimated cost, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  | CAD 7 |
Environmental liabilities |  |  |  |  |  |  |  |  |  |  |  |  | CAD 0 |  |
Number of actions or claims filed | item |  |  |  |  |  |  |  |  |  |  | 1 |  |  | 1 |
Line 6A Crude Oil Release | Enbridge Energy Partners, L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated volume of oil released (in barrels) | bbl |  |  | 9,000 |  |  |  |  |  |  |  |  |  |  |  |
Estimated volume of oil removed from the pipeline as part of the repair (in barrels) | bbl |  |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Minimum amount of purchase obligation, land lease, operating lease, maintenance arrangement maturing in the fourth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded obligations, long-term commitments, and short-term commitments. + References No definition available. + Details
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