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Acquisition Of Canadian Oil Sands Limited - COS Debt Assumed (Details) CAD in Millions, $ in Millions |  | 2 Months Ended | 3 Months Ended | 6 Months Ended | 11 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 05, 2016 USD ($) | Mar. 31, 2016 CAD | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2016 CAD | Dec. 31, 2016 CAD | Dec. 31, 2016 CAD | Dec. 31, 2017 CAD | Dec. 31, 2016 CAD | Feb. 06, 2016 CAD | Feb. 05, 2016 CAD
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  |  |  |  | 5.70% | 5.70% | 5.50% | 5.70% |  |
Credit facility repaid |  |  | $ 1,830.0 | $ 600.0 |  |  |  | CAD 3,283.0 | CAD 1,693.0 |  |
Profit (loss), attributable to non-controlling interests |  |  |  |  |  |  |  |  | CAD 11.0 |  |
Notes 7.75 Percent Due 2019 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt | $ | $ 500.0 |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 7.75% |  |  |  |  | 7.75% | 7.75% | 7.75% | 7.75% |  | 7.75%
Notes 7.90 Percent Due 2021 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt | $ | $ 250.0 |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 7.90% |  |  |  |  |  |  |  |  |  | 7.90%
Notes 4.50 Percent Due 2022 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt | $ | $ 400.0 |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 4.50% |  |  |  |  | 4.50% | 4.50% | 4.50% | 4.50% |  | 4.50%
Notes 8.20 Percent Due 2027 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt | $ | $ 74.0 |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 8.20% |  |  |  |  | 8.20% | 8.20% | 8.20% | 8.20% |  | 8.20%
Notes 6.00 Percent Due 2042 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt | $ | $ 300.0 |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 6.00% |  |  |  |  | 6.00% | 6.00% | 6.00% | 6.00% |  | 6.00%
Maximum |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Pipeline and storage commitment contract term | 24 years |  |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Pipeline and storage commitment contract term | 1 year |  |  |  |  |  |  |  |  |  |
COS |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | CAD 2,639.0
Debt repurchased | $ |  |  |  | $ 688.0 |  |  |  |  |  |  |
Profit (loss), attributable to non-controlling interests |  | CAD 11.0 |  |  |  |  |  |  |  |  |
Pipeline and storage commitments |  |  |  |  |  |  |  |  |  |  | 3,000.0
Acquisition costs |  |  |  |  |  |  |  |  | CAD 29.0 |  |
Contribution to gross revenues |  |  |  |  |  |  | CAD 1,900.0 |  |  |  |
Loss contributed to net income |  |  |  |  |  |  | CAD 69.0 |  |  |  |
Proforma revenue contributed by acquired entity if acquisition had occurred at the beginning of year |  |  |  |  |  |  |  |  | 2,100.0 |  |
Proforma net loss contributed by acquired entity if acquisition had occurred at the beginning of year |  |  |  |  |  |  |  |  | 105.0 |  |
Proforma gross revenues |  |  |  |  |  |  |  |  | 27,000.0 |  |
Proforma net income |  |  |  |  |  |  |  |  | 408.0 |  |
COS | Fixed Term Notes |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 2,089.0
COS | Notes 7.75 Percent Due 2019 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 755.0
COS | Notes 7.90 Percent Due 2021 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 389.0
COS | Notes 4.50 Percent Due 2022 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 515.0
COS | Notes 8.20 Percent Due 2027 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 114.0
COS | Notes 6.00 Percent Due 2042 |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | 316.0
COS | Credit facility |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Total long term debt |  |  |  |  |  |  |  |  |  |  | CAD 550.0
Credit facility repaid |  |  |  |  | CAD 550.0 |  |  |  |  |  |
The amount drawn from facility |  |  |  |  |  |  |  |  |  | CAD 50.0 |
Syncrude |  |  |  |  |  |  |  |  |  |  |
Long term debt assumed |  |  |  |  |  |  |  |  |  |  |
Contribution to gross revenues |  |  |  |  |  | CAD 191.0 |  |  |  |  |
Loss contributed to net income |  |  |  |  |  | CAD (7.0) |  |  |  |  |
Proforma revenue contributed by acquired entity if acquisition had occurred at the beginning of year |  |  |  |  |  |  |  |  | 275.0 |  |
Proforma net loss contributed by acquired entity if acquisition had occurred at the beginning of year |  |  |  |  |  |  |  |  | 26.0 |  |
Proforma gross revenues |  |  |  |  |  |  |  |  | 27,000.0 |  |
Proforma net income |  |  |  |  |  |  |  |  | CAD 412.0 |  |

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