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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [abstract] |
Schedule of Options Outstanding | Options outstanding
|  | 2020 |  |  |  |  |  | 2019 |
For the years ended December 31, |  | Number of options (in millions) |  |  | Weighted average exercise price |  |  |  |  |  | Number of options (in millions) |  |  | Weighted average exercise price |
Outstanding, January 1 |  |  | 21 |  |  | $ | 20.91 |  |  |  |  |  |  |  | 23 |  |  | $ | 20.29 |
Granted |  |  | 5 |  |  |  | 24.38 |  |  |  |  |  |  |  | 3 |  |  |  | 22.62 |
Exercised |  |  | (2 | ) |  |  | 18.17 |  |  |  |  |  |  |  | (4 | ) |  |  | 18.79 |
Expired |  |  | – |  |  |  | 24.27 |  |  |  |  |  |  |  | – |  |  |  | 18.88 |
Forfeited |  |  | – |  |  |  | 23.73 |  |  |  |  |  |  |  | (1 | ) |  |  | 23.41 |
Outstanding, December 31 |  |  | 24 |  |  | $ | 21.74 |  |  |  |  |  |  |  | 21 |  |  | $ | 20.91 |
Exercisable, December 31 |  |  | 6 |  |  | $ | 19.52 |  |  |  |  |  |  |  | 5 |  |  | $ | 17.56 |
Schedule of Range of Exercise Prices of Outstanding Share Options |
|  | Options outstanding |  |  |  |  |  | Options exercisable |
For the year ended December 31, 2020 |  | Number of options (in millions) |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual life (in years) |  |  |  |  |  | Number of options (in millions) |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual life (in years) |
$12.64—$20.99 |  |  | 6 |  |  | $ | 16.77 |  |  |  | 3.75 |  |  |  |  |  |  |  | 2 |  |  | $ | 15.32 |  |  |  | 1.27 |
$21.00—$24.83 |  |  | 18 |  |  | $ | 23.53 |  |  |  | 6.90 |  |  |  |  |  |  |  | 4 |  |  | $ | 21.85 |  |  |  | 3.72 |
Total |  |  | 24 |  |  | $ | 21.74 |  |  |  | 6.06 |  |  |  |  |  |  |  | 6 |  |  | $ | 19.52 |  |  |  | 2.84 |
Schedule of Deferred Share Units | The fair value of 214,000 DSUs issued during the year was $22.65 per unit as at December 31, 2020 (2019 – 229,000 at $26.36 per unit).
For the years ended December 31, Number of DSUs (in thousands) |  | 2020 |  |  | 2019 |
Outstanding, January 1 |  |  | 2,395 |  |  |  | 2,538 |
Issued |  |  | 214 |  |  |  | 229 |
Reinvested |  |  | 145 |  |  |  | 102 |
Redeemed |  |  | (576 | ) |  |  | (416 | )
Forfeitures and cancellations |  |  | (9 | ) |  |  | (58 | )
Outstanding, December 31 |  |  | 2,169 |  |  |  | 2,395 |

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