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v3.20.4

Long-term Debt and Capital Structure - Summary of Net Debt to Adjusted EBITDA (Detail) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 CAD ($) | Dec. 31, 2019 CAD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2017 CAD ($)
Disclosure Of Objectives Policies And Processes For Managing Capital [Line Items] |  |  |  |
Short-Term Borrowings | $ 121 |  |  |
Long-Term Debt | 7,441 | $ 6,699 |  |
Less: Cash and Cash Equivalents | (378) | (186) | $ (781) | $ (610)
Net Debt | 7,184 | 6,513 | 8,383 |
Net Earnings (Loss) | (2,379) | 2,194 | (2,669) |
Add (Deduct): |  |  |  |
Interest Income | (9) | (12) | (19) |
Foreign Exchange (Gain) Loss, Net | (181) | (404) | 854 |
Re-measurement of Contingent Payment | (80) | 164 | 50 |
(Gain) Loss on Divestiture of Assets | (81) | (2) | 795 |
Other (Income) Loss, Net | 40 | 9 | 13 |
Rolling Twelve Month Basis |  |  |  |
Disclosure Of Objectives Policies And Processes For Managing Capital [Line Items] |  |  |  |
Short-Term Borrowings | 121 |  |  |
Current Portion of Long-Term Debt |  |  | 682 |
Long-Term Debt | 7,441 | 6,699 | 8,482 |
Less: Cash and Cash Equivalents | (378) | (186) | (781) |
Net Debt | 7,184 | 6,513 | 8,383 |
Net Earnings (Loss) | (2,379) | 2,194 | (2,669) |
Add (Deduct): |  |  |  |
Finance Costs | 536 | 511 | 628 |
Interest Income | (9) | (12) | (19) |
Income Tax Expense (Recovery) | (851) | (797) | (920) |
Depreciation, Depletion and Amortization | 3,464 | 2,249 | 2,131 |
Exploration Expense | 91 | 82 | 2,123 |
Unrealized (Gain) Loss on Risk Management | 56 | 149 | (1,249) |
Foreign Exchange (Gain) Loss, Net | (181) | (404) | 854 |
Re-measurement of Contingent Payment | (80) | 164 | 50 |
(Gain) Loss on Discontinuance |  |  | (301) |
(Gain) Loss on Divestiture of Assets | (81) | (2) | 795 |
Other (Income) Loss, Net | 40 | 9 | 13 |
Adjusted EBITDA | $ 606 | $ 4,143 | $ 1,436 |
Net Debt to Adjusted EBITDA | 11.9 | 1.6 | 5.8 |

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