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Capital Stock - Subsequent event (Details) - shares | 9 Months Ended |  |
--- | --- | --- | ---
Nov. 30, 2021 | Dec. 17, 2021 | Feb. 28, 2021
Equity [Abstract] |  |  |
Common outstanding (in shares) | 573,666,612 |  | 565,505,328
Class of Stock [Line Items] |  |  |
Common outstanding (in shares) | 573,666,612 |  | 565,505,328
1.75% Debenture |  |  |
Class of Stock [Line Items] |  |  |
Conversion of stock (in shares) | 60,800,000 |  |
Voting Common Stock [Member] | Subsequent Event [Member] |  |  |
Equity [Abstract] |  |  |
Common outstanding (in shares) |  | 574,000,000 |
Class of Stock [Line Items] |  |  |
Common outstanding (in shares) |  | 574,000,000 |
Employee Stock Option [Member] | Subsequent Event [Member] |  |  |
Equity [Abstract] |  |  |
Common outstanding (in shares) |  | 1,000,000 |
Class of Stock [Line Items] |  |  |
Common outstanding (in shares) |  | 1,000,000 |
Restricted Share Units (RSUs) | Subsequent Event [Member] |  |  |
Equity [Abstract] |  |  |
Common outstanding (in shares) |  | 12,000,000 |
Class of Stock [Line Items] |  |  |
Common outstanding (in shares) |  | 12,000,000 |
Deferred Share Unit | Subsequent Event [Member] |  |  |
Equity [Abstract] |  |  |
Common outstanding (in shares) |  | 2,000,000 |
Class of Stock [Line Items] |  |  |
Common outstanding (in shares) |  | 2,000,000 |

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