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Consolidated Statement of Comprehensive Income - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of analysis of other comprehensive income by item [line items] |  |  |
Net earnings | $ 60.6 | $ 70.3 | $ 98.9
Items that will not be reclassified to net earnings: |  |  |
Losses on pension and non-pension post-employment benefit plans | (9.3) | (8.7) | (54.9)
Items that may be reclassified to net earnings: |  |  |
Currency translation differences for foreign operations | 4.3 | (0.2) | 0.1
Total comprehensive income | 59.7 | 64.5 | 24.2
Currency forward |  |  |
Items that may be reclassified to net earnings: |  |  |
Changes from derivatives designated as hedges | 8.5 | 10.8 | (15.5)
Interest rate swap |  |  |
Items that may be reclassified to net earnings: |  |  |
Changes from derivatives designated as hedges | $ (4.4) | $ (7.7) | $ (4.4)

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