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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2020
Cash And Cash Equivalents [Abstract] |
Disclosure Of Cash And Cash Equivalent Explanatory |
As at December 31, | 2020 |  |  | 2019 |
Cash |  | 368 |  |  |  | 108 |
Short-Term Investments |  | 10 |  |  |  | 78 |
|  | 378 |  |  |  | 186 |

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