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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2021
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, 2021 and 2020, are summarized in the following table:
(CAD$ in millions) |  | 2021 |  | 2020
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 790 |  |  | $ | — |  |  | $ | — |  |  | $ | 790 |  |  | $ | 313 |  |  | $ | — |  |  | $ | — |  |  | $ | 313 |
Marketable equity securities |  | 41 |  |  | — |  |  | 47 |  |  | 88 |  |  | 64 |  |  | — |  |  | 38 |  |  | 102 |
Debt securities |  | 104 |  |  | — |  |  | 1 |  |  | 105 |  |  | 88 |  |  | — |  |  | 2 |  |  | 90 |
Settlement receivables |  | — |  |  | 1,126 |  |  | — |  |  | 1,126 |  |  | — |  |  | 949 |  |  | — |  |  | 949 |
Derivative instruments and embedded derivatives |  | — |  |  | 78 |  |  | — |  |  | 78 |  |  | — |  |  | 96 |  |  | — |  |  | 96 |
|  | $ | 935 |  |  | $ | 1,204 |  |  | $ | 48 |  |  | $ | 2,187 |  |  | $ | 465 |  |  | $ | 1,045 |  |  | $ | 40 |  |  | $ | 1,550 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments and embedded derivatives |  | $ | — |  |  | $ | 158 |  |  | $ | — |  |  | $ | 158 |  |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Settlement payables |  | — |  |  | 39 |  |  | — |  |  | 39 |  |  | — |  |  | 61 |  |  | — |  |  | 61 |
|  | $ | — |  |  | $ | 197 |  |  | $ | — |  |  | $ | 197 |  |  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 93 |
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, 2021 and 2020, are summarized in the following table:
(CAD$ in millions) |  | 2021 |  | 2020
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 790 |  |  | $ | — |  |  | $ | — |  |  | $ | 790 |  |  | $ | 313 |  |  | $ | — |  |  | $ | — |  |  | $ | 313 |
Marketable equity securities |  | 41 |  |  | — |  |  | 47 |  |  | 88 |  |  | 64 |  |  | — |  |  | 38 |  |  | 102 |
Debt securities |  | 104 |  |  | — |  |  | 1 |  |  | 105 |  |  | 88 |  |  | — |  |  | 2 |  |  | 90 |
Settlement receivables |  | — |  |  | 1,126 |  |  | — |  |  | 1,126 |  |  | — |  |  | 949 |  |  | — |  |  | 949 |
Derivative instruments and embedded derivatives |  | — |  |  | 78 |  |  | — |  |  | 78 |  |  | — |  |  | 96 |  |  | — |  |  | 96 |
|  | $ | 935 |  |  | $ | 1,204 |  |  | $ | 48 |  |  | $ | 2,187 |  |  | $ | 465 |  |  | $ | 1,045 |  |  | $ | 40 |  |  | $ | 1,550 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments and embedded derivatives |  | $ | — |  |  | $ | 158 |  |  | $ | — |  |  | $ | 158 |  |  | $ | — |  |  | $ | 32 |  |  | $ | — |  |  | $ | 32 |
Settlement payables |  | — |  |  | 39 |  |  | — |  |  | 39 |  |  | — |  |  | 61 |  |  | — |  |  | 61 |
|  | $ | — |  |  | $ | 197 |  |  | $ | — |  |  | $ | 197 |  |  | $ | — |  |  | $ | 93 |  |  | $ | — |  |  | $ | 93 |

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