Document and Entity Information	12 Months Ended
	Dec. 31, 2023 shares
Document Information [Line Items]
Document Type	20-F
Document Registration Statement	false
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity Shell Company	false
Entity File Number	1-14832
Entity Registrant Name	CELESTICA INC.
Entity Incorporation, State or Country Code	A6
Country of incorporation	Canada
Entity Address, Address Line One	5140 Yonge Street, Suite 1900
Entity Address, City or Town	Toronto
Entity Address, State or Province	ON
Entity Address, Country	CA
Entity Address, Postal Zip Code	M2N 6L7
Contact Personnel Email Address	clsir@celestica.com
Title of 12(b) Security	Subordinate Voting Shares
Trading Symbol	CLS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Accounting Standard	International Financial Reporting Standards
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Central Index Key	0001030894
Document Financial Statement Error Correction [Flag]	false
Business Contact
Document Information [Line Items]
Entity Address, Address Line One	5140 Yonge Street, Suite 1900
Entity Address, City or Town	Toronto
Entity Address, State or Province	ON
Entity Address, Country	CA
Entity Address, Postal Zip Code	M2N 6L7
Contact Personnel Name	Craig Oberg
City Area Code	416
Local Phone Number	448-2211
SVS
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	118,952,174
MVS
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	0
Preference Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	0