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Financial Instruments and Risk Management - Derivative and Hedging Instruments (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 562.6 | $ 523.9
Fair value gain/(loss) | 23.3 | 4.5
Derivative assets | 29.4 | 7.4
Derivative liabilities | 6.1 | 2.9
Contract amount of U.S. dollars | 562.6 | 523.9
Fair value gain/(loss) | 23.3 | 4.5
Canadian dollar |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 230.8 | $ 195.6
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.76 | 0.76
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 11.7 | $ 2.1
Contract amount of U.S. dollars | $ 230.8 | $ 195.6
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.76 | 0.76
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 11.7 | $ 2.1
Thai baht |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 107.7 | $ 98.8
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.03 | 0.03
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 4.7 | $ 2.1
Contract amount of U.S. dollars | $ 107.7 | $ 98.8
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.03 | 0.03
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 4.7 | $ 2.1
Malaysian ringgit |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 48.7 | $ 54.1
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.24 | 0.24
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.6 | $ 0.4
Contract amount of U.S. dollars | $ 48.7 | $ 54.1
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.24 | 0.24
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.6 | $ 0.4
Mexican peso |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 20.1 | $ 22.4
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.05 | 0.05
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.6 | $ 0.9
Contract amount of U.S. dollars | $ 20.1 | $ 22.4
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.05 | 0.05
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.6 | $ 0.9
British pound |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 0.8 | $ 2.2
Weighted average exchange rate in U.S. dollars (in dollars per share) | 1.33 | 1.29
Maximum period in months | 4 months | 4 months
Fair value gain/(loss) | $ 0.1 | $ 0.1
Contract amount of U.S. dollars | $ 0.8 | $ 2.2
Weighted average exchange rate in U.S. dollars (in dollars per share) | 1.33 | 1.29
Maximum period in months | 4 months | 4 months
Fair value gain/(loss) | $ 0.1 | $ 0.1
Chinese renminbi |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 44.0 | $ 48.8
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.15 | 0.14
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 2.8 | $ (0.7)
Contract amount of U.S. dollars | $ 44.0 | $ 48.8
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.15 | 0.14
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 2.8 | $ (0.7)
Euro |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 39.5 | $ 26.1
Weighted average exchange rate in U.S. dollars (in dollars per share) | 1.21 | 1.12
Maximum period in months | 10 months | 12 months
Fair value gain/(loss) | $ (1.5) | $ (0.5)
Contract amount of U.S. dollars | $ 39.5 | $ 26.1
Weighted average exchange rate in U.S. dollars (in dollars per share) | 1.21 | 1.12
Maximum period in months | 10 months | 12 months
Fair value gain/(loss) | $ (1.5) | $ (0.5)
Romanian Leu |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 28.6 | $ 33.5
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.23 | 0.23
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 2.0 | $ 0.1
Contract amount of U.S. dollars | $ 28.6 | $ 33.5
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.23 | 0.23
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 2.0 | $ 0.1
Singapore dollar |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 27.5 | $ 23.9
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.73 | 0.74
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.0 | $ 0.2
Contract amount of U.S. dollars | $ 27.5 | $ 23.9
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.73 | 0.74
Maximum period in months | 12 months | 12 months
Fair value gain/(loss) | $ 1.0 | $ 0.2
Other |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 6.9 | $ 18.5
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.0009 | 0
Maximum period in months | 1 month | 4 months
Fair value gain/(loss) | $ (0.5) | $ (0.2)
Contract amount of U.S. dollars | $ 6.9 | $ 18.5
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.0009 | 0
Maximum period in months | 1 month | 4 months
Fair value gain/(loss) | $ (0.5) | $ (0.2)
Japan, Yen |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Contract amount of U.S. dollars | $ 8.0 |
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.01 |
Maximum period in months | 4 months |
Fair value gain/(loss) | $ (0.2) |
Contract amount of U.S. dollars | $ 8.0 |
Weighted average exchange rate in U.S. dollars (in dollars per share) | 0.01 |
Maximum period in months | 4 months |
Fair value gain/(loss) | $ (0.2) |

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