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Income Taxes - Changes in Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance | $ 39.9 | $ 33.6
Credited to net earnings | 8.8 | 9.9
Credited (charged) directly to equity | 1.1 | 0.3
Deferred Tax Relating To Business Combinations, Deferred Tax Asset | (1.1) |
Effects of foreign exchange | (0.4) | 0.9
Other | (2.8) | (4.8)
Deferred tax assets, ending balance | 47.7 | 39.9
Reconciliation of changes in deferred tax liability [Roll Forward] |  |
Deferred tax liabilities, beginning balance | 32.3 | 28.4
Charged (credited) to net earnings | 0.0 | 6.6
Additions from business combinations | 30.7 |
Charged (credited) directly to equity |  | 0.8
Effects of foreign exchange | 0.0 | 1.3
Other | (2.8) | (4.8)
Deferred tax liabilities, ending balance | 60.2 | 32.3
Unrealized foreign exchange gains |  |
Reconciliation of changes in deferred tax liability [Roll Forward] |  |
Deferred tax liabilities, beginning balance | 27.2 | 26.4
Charged (credited) to net earnings | (0.2) | (0.2)
Effects of foreign exchange | 0.2 | 1.0
Deferred tax liabilities, ending balance | 27.2 | 27.2
Accounting provisions not currently deductible |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance | 10.5 | 9.6
Credited to net earnings | 7.2 | 0.9
Deferred Tax Relating To Business Combinations, Deferred Tax Asset | (0.1) |
Effects of foreign exchange | (0.1) |
Deferred tax assets, ending balance | 17.7 | 10.5
Pensions and non-pension post-retirement benefits |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance | 0.7 | (0.2)
Credited to net earnings | 2.1 | 0.4
Credited (charged) directly to equity |  | 0.6
Effects of foreign exchange |  | (0.1)
Deferred tax assets, ending balance | 2.8 | 0.7
Tax losses carried forward |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance | 72.2 | 62.9
Credited to net earnings | (3.2) | 8.6
Credited (charged) directly to equity |  | (0.3)
Effects of foreign exchange | 0.2 | 1.0
Deferred tax assets, ending balance | 69.2 | 72.2
Property, plant and equipment and intangibles |  |
Reconciliation of changes in deferred tax liability [Roll Forward] |  |
Deferred tax liabilities, beginning balance | 45.5 | 52.1
Charged (credited) to net earnings | 0.2 | (6.7)
Additions from business combinations | 30.7 |
Effects of foreign exchange | (0.2) | 0.1
Deferred tax liabilities, ending balance | 76.2 | 45.5
Other |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance |  | 11.4
Credited to net earnings | 2.7 |
Credited (charged) directly to equity | 1.1 |
Deferred Tax Relating To Business Combinations, Deferred Tax Asset | (1.0) |
Effects of foreign exchange | (0.5) |
Other | (3.1) | (11.4)
Deferred tax assets, ending balance | 1.2 |
Reconciliation of changes in deferred tax liability [Roll Forward] |  |
Deferred tax liabilities, beginning balance | 3.1 | 0.0
Charged (credited) to net earnings |  | 13.5
Charged (credited) directly to equity |  | 0.8
Effects of foreign exchange |  | 0.2
Other | (3.1) | (11.4)
Deferred tax liabilities, ending balance | 0.0 | 3.1
Reclassification between deferred tax assets and deferred tax liabilities |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Deferred tax assets, beginning balance | (43.5) | (50.1)
Other | 0.3 | 6.6
Deferred tax assets, ending balance | (43.2) | (43.5)
Reconciliation of changes in deferred tax liability [Roll Forward] |  |
Deferred tax liabilities, beginning balance | (43.5) | (50.1)
Other | 0.3 | 6.6
Deferred tax liabilities, ending balance | $ (43.2) | $ (43.5)

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