Income Tax - Summary of Years Open to Examination under Different Jurisdiction (Detail)
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12 Months Ended |
Dec. 31, 2021 |
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| Earliest Tax Year [Member] | Canada [Member] | Canada [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2017
|
| Earliest Tax Year [Member] | Canada [Member] | UK [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2013
|
| Earliest Tax Year [Member] | US [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2018
|
| Latest Tax Year [Member] | Canada [Member] | Canada [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2021
|
| Latest Tax Year [Member] | Canada [Member] | UK [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2021
|
| Latest Tax Year [Member] | US [Member] |
|
| Income Tax Examination [Line Items] |
|
| Years open to examination |
2021
|