v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Jul. 23, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-14832  
Entity Registrant Name CELESTICA INC.  
Entity Incorporation, State or Country Code A6  
Entity Tax Identification Number 98-0185558  
Entity Address, Address Line One 5140 Yonge Street  
Entity Address, Address Line Two 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  
City Area Code 416  
Local Phone Number 448-2211  
Title of 12(b) Security Common Shares  
Trading Symbol CLS  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   115,032,686
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001030894