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Income Taxes - Reconciliation Of Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Earnings before income taxes | $ 90.2 | $ 99.8 | $ 81.9
Income tax expense at Celestica’s statutory income tax rate of 26.5% (2018 - 2020) | 23.9 | 26.4 | 21.7
Manufacturing and processing deduction | 0.0 | 0.0 | (0.1)
Foreign income taxed at different rates | (16.3) | (6.7) | (9.1)
Foreign exchange | (8.6) | 5.0 | 3.8
Other, including non-taxable/non-deductible items and changes to net provisions related to tax uncertainties | 25.0 | (5.8) | 11.3
Tax effect from change in tax rate | 0.0 | (0.8) | 0.0
Change in unrecognized tax losses and deductible temporary differences | 5.6 | 11.4 | (44.6)
Income tax expense (recovery) | 29.6 | 29.5 | (17.0)
Deferred tax expense related to taxable temporary differences, repatriation of undistributed foreign earnings | 16.5 | 6.0 |
Withholding tax on dividends paid | 1.8 |  |
Deferred tax assets | $ 39.9 | $ 33.6 | 36.7
U.S. group of subsidiaries |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Deferred tax assets |  |  | $ 53.3

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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2020-01-01 + Details
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