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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Measurement [Abstract] |
Summary of Fair Values of Financial Assets Measured at Fair Value on Recurring Basis | The fair values of our financial assets and liabilities measured at fair value on a recurring basis at December 31, 2020 and 2019, are summarized in the following table:
(CAD$ in millions) |  | 2020 |  | 2019
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 313 |  |  | $ | — |  |  | $ | — |  |  | $ | 313 |  |  | $ | 877 |  |  | $ | — |  |  | $ | — |  |  | $ | 877 |
Marketable equity securities |  | 64 |  |  | — |  |  | 38 |  |  | 102 |  |  | 53 |  |  | — |  |  | 36 |  |  | 89 |
Debt securities |  | 88 |  |  | — |  |  | 2 |  |  | 90 |  |  | 104 |  |  | — |  |  | 2 |  |  | 106 |
Settlement receivables |  | — |  |  | 949 |  |  | — |  |  | 949 |  |  | — |  |  | 465 |  |  | — |  |  | 465 |
Derivative instruments and embedded derivatives |  | — |  |  | 96 |  |  | — |  |  | 96 |  |  | — |  |  | 29 |  |  | — |  |  | 29 |
|  | $ | 465 |  |  | $ | 1,045 |  |  | $ | 40 |  |  | $ | 1,550 |  |  | $ | 1,034 |  |  | $ | 494 |  |  | $ | 38 |  |  | $ | 1,566 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments and embedded derivatives |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 33 |  |  | $ | — |  |  | $ | 33 |
Settlement payables |  | — |  |  | 61 |  |  | — |  |  | 61 |  |  | — |  |  | 16 |  |  | — |  |  | 16 |
|  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 49 |  |  | $ | — |  |  | $ | 49 |
Summary of Fair Values of Financial Liabilities Measured at Fair Value on Recurring Basis | The fair values of our financial assets and liabilities measured at fair value on a recurring basis at December 31, 2020 and 2019, are summarized in the following table:
(CAD$ in millions) |  | 2020 |  | 2019
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 313 |  |  | $ | — |  |  | $ | — |  |  | $ | 313 |  |  | $ | 877 |  |  | $ | — |  |  | $ | — |  |  | $ | 877 |
Marketable equity securities |  | 64 |  |  | — |  |  | 38 |  |  | 102 |  |  | 53 |  |  | — |  |  | 36 |  |  | 89 |
Debt securities |  | 88 |  |  | — |  |  | 2 |  |  | 90 |  |  | 104 |  |  | — |  |  | 2 |  |  | 106 |
Settlement receivables |  | — |  |  | 949 |  |  | — |  |  | 949 |  |  | — |  |  | 465 |  |  | — |  |  | 465 |
Derivative instruments and embedded derivatives |  | — |  |  | 96 |  |  | — |  |  | 96 |  |  | — |  |  | 29 |  |  | — |  |  | 29 |
|  | $ | 465 |  |  | $ | 1,045 |  |  | $ | 40 |  |  | $ | 1,550 |  |  | $ | 1,034 |  |  | $ | 494 |  |  | $ | 38 |  |  | $ | 1,566 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments and embedded derivatives |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 33 |  |  | $ | — |  |  | $ | 33 |
Settlement payables |  | — |  |  | 61 |  |  | — |  |  | 61 |  |  | — |  |  | 16 |  |  | — |  |  | 16 |
|  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 49 |  |  | $ | — |  |  | $ | 49 |

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