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Pension and Non-pension Post-employment Benefit Plans - Plan Balances Reported on Consolidated Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of defined benefit plans [line items] |  |
Pension and non-pension post-employment benefit obligations | $ (107.5) | $ (117.3)
Current other post-employment benefit obligations | (0.3) | (0.7)
Non-current net defined benefit asset (note 9) | 5.1 | 5.6
Excess (deficiency) of plan assets over accrued benefit obligations | (102.7) | (112.4)
Pension Plan |  |
Disclosure of defined benefit plans [line items] |  |
Pension and non-pension post-employment benefit obligations | (20.7) | (24.4)
Current other post-employment benefit obligations | 0.0 | 0.0
Non-current net defined benefit asset (note 9) | 5.1 | 5.6
Excess (deficiency) of plan assets over accrued benefit obligations | (15.6) | (18.8)
Other benefit plans |  |
Disclosure of defined benefit plans [line items] |  |
Pension and non-pension post-employment benefit obligations | (86.8) | (92.9)
Current other post-employment benefit obligations | (0.3) | (0.7)
Non-current net defined benefit asset (note 9) | 0.0 | 0.0
Excess (deficiency) of plan assets over accrued benefit obligations | $ (87.1) | $ (93.6)

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- Definition The amount of current net defined benefit liability. [Refer: Net defined benefit liability] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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