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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - NOTIONAL PRINCIPAL OR QUANTITY INFORMATION (Details) MMcf in Thousands, € in Millions, £ in Millions, CAD in Millions, $ in Millions | Dec. 31, 2015 GBP (£) MWh MMBbls MMcf | Dec. 31, 2015 USD ($) MWh MMBbls MMcf | Dec. 31, 2015 CAD MWh MMBbls MMcf | Dec. 31, 2014 EUR (€) MWh MMBbls MMcf | Dec. 31, 2014 USD ($) MWh MMBbls MMcf | Dec. 31, 2014 CAD MWh MMBbls MMcf
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Foreign exchange contracts - United States or Euro dollar forwards - purchase |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | £ 70 | $ 172 |  | € 15 | $ 240 |
2016/2017 | 77 | 413 |  |  | 25 |
2017/2018 | 6 | 2 |  |  | 413 |
2018/2019 | $ |  | 2 |  |  | 2 |
2019/2020 | $ |  | 2 |  |  | 2 |
Thereafter | $ |  |  |  |  | 2 |
Foreign exchange contracts - United States dollar or GBP forwards - sell |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | $ |  | 3,059 |  |  | 3,203 |
2016/2017 | $ |  | 3,213 |  |  | 2,470 |
2017/2018 | $ |  | 3,133 |  |  | 2,832 |
2018/2019 | 89 | 2,630 |  |  | 3,100 |
2019/2020 | 25 | 2,303 |  |  | 2,441 |
Thereafter | £ 144 | $ 787 |  |  | $ 2,901 |
Interest rate contracts - short-term borrowings |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 |  |  | CAD 8,382 |  |  | CAD 5,767
2016/2017 |  |  | 7,604 |  |  | 5,486
2017/2018 |  |  | 4,536 |  |  | 4,851
2018/2019 |  |  | 1,574 |  |  | 3,529
2019/2020 |  |  | 156 |  |  | 222
Thereafter |  |  | 406 |  |  | 469
Interest rate contracts - long-term debt |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 |  |  | 4,291 |  |  | 3,528
2016/2017 |  |  | 3,371 |  |  | 1,762
2017/2018 |  |  | 1,960 |  |  | 2,470
2018/2019 |  |  | 773 |  |  | 1,176
Equity contracts |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 |  |  | 51 |  |  | 41
2016/2017 |  |  | CAD 48 |  |  | CAD 51
Commodity contracts | Natural gas |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | MMcf | (126) | (126) | (126) | (62) | (62) | (62)
2016/2017 | MMcf | (209) | (209) | (209) | (10) | (10) | (10)
2017/2018 | MMcf | (17) | (17) | (17) | (25) | (25) | (25)
2018/2019 | MMcf | 2 | 2 | 2 | (1) | (1) | (1)
2019/2020 | MMcf | 1 | 1 | 1 |  |  |
Commodity contracts | Crude oil |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | MMBbls | (6) | (6) | (6) | 3 | 3 | 3
2016/2017 | MMBbls | (17) | (17) | (17) | (18) | (18) | (18)
2017/2018 | MMBbls | (9) | (9) | (9) | (18) | (18) | (18)
2018/2019 | MMBbls |  |  |  | (9) | (9) | (9)
Commodity contracts | NGL |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | MMBbls | (5) | (5) | (5) | (5) | (5) | (5)
2016/2017 | MMBbls | 1 | 1 | 1 |  |  |
Commodity contracts | Power |  |  |  |  |  |
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS |  |  |  |  |  |
2015/2016 | MWh | 40 | 40 | 40 | 25 | 25 | 25
2016/2017 | MWh | 40 | 40 | 40 | 40 | 40 | 40
2017/2018 | MWh | 30 | 30 | 30 | 40 | 40 | 40
2018/2019 | MWh | 31 | 31 | 31 | 30 | 30 | 30
2019/2020 | MWh | 35 | 35 | 35 | 31 | 31 | 31
Thereafter | MWh | (35) | (35) | (35) |  |  |

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