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Pension and Non-pension Post-employment Benefit Plans - Summary of Accrued Benefit Obligations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Pension Plan |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | $ 2.2 | $ 0.3 | $ 2.5
Past service cost (credit) and settlement/curtailment losses | 0.0 | 0.0 | 0.0
Interest cost | $ 0.1 | $ 0.4 | 0.4
Actuarial losses (gains) in other comprehensive income from: |  |  |
Weighted average duration of benefit obligations (in years) | 13 years | 13 years |
Other benefit plans |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | $ 3.1 | $ 3.1 | 3.4
Past service cost (credit) and settlement/curtailment losses | (0.9) | 0.0 | (0.3)
Interest cost | $ 3.1 | $ 2.7 | 2.4
Actuarial losses (gains) in other comprehensive income from: |  |  |
Weighted average duration of benefit obligations (in years) | 10 years | 10 years |
Accrued benefit obligations | Pension Plan |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Accrued benefit obligations, beginning of year | $ 216.9 | $ 373.9 |
Current service cost | 2.2 | 0.3 |
Past service cost (credit) and settlement/curtailment losses | 0.0 | 0.0 |
Interest cost | 10.2 | 6.2 |
Actuarial losses (gains) in other comprehensive income from: |  |  |
— Changes in demographic assumptions | (6.5) | (0.5) |
— Changes in financial assumptions | 5.8 | (124.7) |
— Experience adjustments | (8.0) | 7.5 |
Settlement payments from employer | 0.0 | 0.0 |
Settlement payments from plan | 0.0 | 0.0 |
Benefit payments from plan | (10.8) | (10.4) |
Benefit payments from employer | (0.3) | (0.1) |
Foreign currency exchange rate changes and other | 9.8 | (35.3) |
Accrued benefit obligations, end of year | 219.3 | 216.9 | 373.9
Accrued benefit obligations | Other benefit plans |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Accrued benefit obligations, beginning of year | 66.3 | 89.1 |
Current service cost | 3.1 | 3.1 |
Past service cost (credit) and settlement/curtailment losses | 0.9 | 0.0 |
Interest cost | 3.2 | 2.7 |
Actuarial losses (gains) in other comprehensive income from: |  |  |
— Changes in demographic assumptions | 0.0 | (4.6) |
— Changes in financial assumptions | 3.3 | (15.7) |
— Experience adjustments | 1.3 | (1.8) |
Settlement payments from employer | (1.1) | 0.0 |
Settlement payments from plan | (0.1) | 0.0 |
Benefit payments from plan | (0.4) | (0.4) |
Benefit payments from employer | (3.7) | (2.4) |
Foreign currency exchange rate changes and other | 1.6 | (3.7) |
Accrued benefit obligations, end of year | $ 74.4 | $ 66.3 | $ 89.1

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_e&doctype=Standard -URIDate 2023-03-23 + Details
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