BASIS OF PREPARATION AND SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	12 Months Ended
Dec. 31, 2024 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Recoverability of goodwill, strategic plan period	3 years
Celestica Share Unit Plan (CSUP)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, vested award, conversion ratio	1
Long-Term Inventive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, vested award, conversion ratio	1
Employee Stock Option
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	4 years
Employee Stock Option \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	25.00%
Employee Stock Option \| Share-Based Payment Arrangement, Tranche Four
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	25.00%
RSUs
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	3 years
Right to receive common share (in shares)	1
RSUs \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	33.33%
RSUs \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	33.33%
RSUs \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting percentage	33.33%
PSUs
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period	3 years
Share-based payment award, awards granted, percentage of target	100.00%
Share-based compensation arrangement by share-based payment award, award performance period	3 years
PSUs \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, awards granted, percentage of target	0.00%
PSUs \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, awards granted, percentage of target	200.00%
Deferred Share Unit
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Annual installment fee payable , threshold percentage	100.00%
Right to receive common share (in shares)	1
Deferred Share Unit \| Share-Based Payment Arrangement, Tranche One
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Annual installment fee payable , threshold percentage	0.00%
Deferred Share Unit \| Share-Based Payment Arrangement, Tranche Two
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Annual installment fee payable , threshold percentage	25.00%
Deferred Share Unit \| Share-Based Payment Arrangement, Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Annual installment fee payable , threshold percentage	50.00%

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