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Pension and Non-pension Post-employment Benefit Plans - Surplus (Deficit) in Defined Benefit Pension and Other Benefit Plans (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of net defined benefit liability (asset) [line items] |  |
Plan assets, end of year | $ 361.9 | $ 380.1
Pension Plan |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Accrued benefit obligations, end of year | (373.9) | (396.9)
Plan assets, end of year | 359.9 | 378.1
Reduction of plan assets due to IFRS restrictions described in note 2(l) | (1.6) | 0.0
Deficiency of plan assets over accrued benefit obligations | (15.6) | (18.8)
Other benefit plans |  |
Disclosure of net defined benefit liability (asset) [line items] |  |
Accrued benefit obligations, end of year | (89.1) | (95.6)
Plan assets, end of year | 2.0 | 2.0
Reduction of plan assets due to IFRS restrictions described in note 2(l) | 0.0 | 0.0
Deficiency of plan assets over accrued benefit obligations | $ (87.1) | $ (93.6)

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- Definition Plan Assets, Decrease Due To Restrictions + References No definition available. + Details
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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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- Details
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