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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Details 8) (CAD) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Changes in net fair value of derivative assets and liabilities classified as Level 3 in the fair value hierarchy |  |  |
Level 3 net derivative asset/(liability) at beginning of period | (24) | 32 |
Total gains/(loss) |  |  |
included in earnings | (74) | 65 |
included in OCI | 11 | 50 |
Settlements | 8 | (6) |
Level 3 net derivative asset/(liability) at end of period | (79) | 141 |
Amount of transfer of fair value of assets between level | 0 | 0 |
Amount of transfer of fair value of liabilities between level | 0 | 0 |
Fair Value of Other Financial Instruments |  |  |
Equity investments at carrying value | 91 |  | 66
Preferred share investment | Minimum |  |  |
Fair Value of Other Financial Instruments |  |  |
Cumulative dividends based on average yield of Government of Canada bonds, maturity period of bonds | 10 years |  |
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent) | 4.30% |  |
Preferred share investment | Maximum |  |  |
Fair Value of Other Financial Instruments |  |  |
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent) | 4.40% |  |
Carrying value |  |  |
Fair Value of Other Financial Instruments |  |  |
Long-term debt | 21,019 |  | 20,855
Carrying value | Preferred share investment |  |  |
Fair Value of Other Financial Instruments |  |  |
Held to maturity preferred share investment | 274 |  | 246
Fair value |  |  |
Fair Value of Other Financial Instruments |  |  |
Long-term debt | 23,476 |  | 24,809
Fair value | Preferred share investment |  |  |
Fair Value of Other Financial Instruments |  |  |
Held to maturity preferred share investment | 580 |  | 580

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