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Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Earnings before income taxes | $ 306.6 | $ 203.6 | $ 136.0
Income tax expense at Celestica’s statutory income tax rate of 26.5% (2021 to 2023) | 81.3 | 54.0 | 36.1
Foreign income taxed at different rates | (51.4) | (34.1) | (16.9)
Foreign exchange | 4.0 | 5.7 | 1.2
Other, including non-taxable/non-deductible items and changes to net provisions related to tax uncertainties | 19.1 | 2.9 | 8.2
Change in tax rates | 0.0 | 0.1 | (7.6)
Change in unrecognized tax losses and deductible temporary differences | 9.0 | 29.5 | 11.1
Income tax expense | 62.0 | $ 58.1 | $ 32.1
Thailand |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Initial percentage of tax exemption (percent) |  |  | 100.00%
Percentage of tax exemption |  | 50.00% |
China |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax expense, repatriated undistributed foreign earnings | $ 11.3 | $ 3.3 | $ 6.0
Deferred tax expense, repatriated foreign earnings paid in current year |  | $ 3.3 | $ 2.5

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