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Capital Stock - Schedule of Changes in Number of Common Shares Outstanding (Detail) - shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Class Of Stock [Line Items] |  |
Beginning balance | 249,792,908 | 246,348,092
Treasury shares | (598,889) | 3,149
Ending balance | 252,176,071 | 249,792,908
Restricted Stock |  |
Class Of Stock [Line Items] |  |
Restricted stock grants | 601,983 | 1,293,892
Restricted stock units vested | 1,787,286 | 1,493,341
Performance Share |  |
Class Of Stock [Line Items] |  |
Performance stock units issued | 590,940 | 640,468
Performance stock dividends | 1,843 | 13,966

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