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Other Charges (Recoveries) - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring and Related Costs [Line Items] |  |  |  |  |
Expense of restructuring activities |  |  | $ 10.5 | $ 25.8 | $ 37.9
Cash restructure charges |  |  | 9.8 | 23.3 | 28.1
Impairment loss (reversal of impairment loss) recognised in profit or loss |  |  | 0.7 | 2.5 | 9.8
Restructuring provision |  | $ 11.2 | 6.1 | 4.7 | 11.2
Gains (losses) on disposals of non-current assets |  |  |  | 0.3 |
Losses on post-employment benefit plan |  |  | 0.0 | 0.0 | 4.1
Toronto transition costs (recoveries) |  |  | 1.2 | 0.0 | (95.8)
Accelerated amortization of unamortized deferred financing costs |  |  | 3.0 | 0.0 | 2.0
Net acquisition costs |  |  | 6.1 |  |
Costs related to acquisition activities |  |  | 7.3 |  | 3.9
Release of indirect tax liabilities |  |  | (1.2) |  |
Integration and acquisition-related transaction costs |  |  |  |  | 3.9
Acquisition-related costs for potential acquisitions |  |  |  | 0.2 | 1.7
Gains on litigation settlements |  |  | 10.5 | 2.5 | 2.0
Impakt Acquisition |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Charges related to re-measurement of indemnification assets after acquisition |  |  |  |  | 2.2
Property, plant and equipment |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  |  | 1.5 |  |
Gains on sale of surplus equipment |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  |  | (0.8) |  |
Pension Plan Adjustment From Change In Law |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Losses on post-employment benefit plan |  | 4.1 |  |  |
Gain on Sale of Toronto Property |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Toronto transition costs (recoveries) | $ (102.0) |  |  |  |
Internal Transition Costs |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Toronto transition costs (recoveries) |  |  |  | 0.0 | 2.4
Credit Facility |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Accelerated amortization of unamortized deferred financing costs |  |  | $ 2.6 |  |
Fee and commission expense |  | $ 2.0 |  |  | 2.0
Right-of-use assets |  |  |  |  |
Restructuring and Related Costs [Line Items] |  |  |  |  |
Write-downs of property, plant and equipment |  |  |  | $ 1.1 | $ 1.0

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