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Defined Benefit Obligation and Other Long-Term Liabilities | 12 Months Ended
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Dec. 31, 2021
Subclassifications of assets, liabilities and equities [abstract] |
Defined Benefit Obligation and Other Long-Term Liabilities | Defined Benefit Obligation and Other Long-Term LiabilitiesThe components of defined benefit obligation and other long-term liabilities are as follows:
As at Dec. 31 | 2021 | 2020
Defined benefit obligation (Note 31) | 228 |  | 282 |
Long-term incentive accruals (Note 30) | 4 |  | 4 |
Other | 21 |  | 12 |
Total | 253 |  | 298 |
The liability for pension and post-employment benefits and associated costs included in compensation expenses are impacted by estimates related to changes in key actuarial assumptions, including discount rates. As a result of increases in discount rates in 2021, largely driven by increases in market benchmark rates, the defined benefit obligation has decreased by $54 million to $228 million as at Dec. 31, 2021, from $282 million as at Dec. 31, 2020.

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- Definition Disclosure Of Noncurrent Defined Benefit Plan Liabilities and Other Noncurrent Liabilities [Text Block] + References No definition available. + Details
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