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Share-Based Compensation - Narrative (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 CAD ($) shares | Mar. 31, 2019 shares $ / shares | Jun. 30, 2020 CAD ($) shares | Jun. 30, 2019 CAD ($) shares | Jun. 30, 2018 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of common shares issuable pursuant to compensation arrangements (shall not exceed) | 10.00% |  | 10.00% |  |
Options outstanding (in shares) | 5,748,503 |  | 5,748,503 | 5,693,397 | 2,346,343
Exercise period | 3 years 11 months 11 days |  |  |  |
Weighted average fair value of stock options granted (in CAD per share) | $ | $ 25.26 |  | $ 25.26 | $ 63.36 |
Number of other equity instruments outstanding in share-based payment arrangement (in shares) | 376,296 |  | 376,296 | 169,195 | 179,167
Weighted average fair value of RSUs and DSUs granted (in CAD per share) | $ | $ 37.82 |  | $ 37.82 | $ 96.24 |
Stock options |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Aggregate share-based compensation expense | $ |  |  | $ 43,700,000 | $ 86,700,000 |
RSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of common shares, right to receive (in shares) | 1 |  | 1 |  |
Number of instruments reserved (in shares) | 833,333 |  | 833,333 |  |
Number of other equity instruments outstanding in share-based payment arrangement (in shares) | 360,098 |  | 360,098 | 166,778 |
DSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Instrument redemption period following termination | 90 |  | 90 |  |
Number of other equity instruments outstanding in share-based payment arrangement (in shares) | 16,198 |  | 16,198 | 2,417 |
DSUs and RSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Aggregate share-based compensation expense | $ |  |  | $ 5,800,000 | $ 5,300,000 |
Top of range | DSUs |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of other equity instruments outstanding in share-based payment arrangement (in shares) | 83,333 |  | 83,333 |  |
Strategic Advisor |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Options outstanding (in shares) |  | 1,663,480 |  |  |
Exercise price (in CAD per share) | $ / shares |  | $ 124.08 |  |  |
Exercise period |  | 7 years |  |  |
Vesting period |  | 4 |  |  |
Strategic Advisor | Stock options |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Aggregate share-based compensation expense | $ |  |  | $ 4,300,000 | $ 16,700,000 |

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