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Cover Page - shares
 6 Months Ended
Jun. 28, 2020
Aug. 11, 2020
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Period End Date Jun. 28, 2020  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Document Quarterly Report true  
Document Transition Report false  
Entity Registrant Name Upjohn Inc  
Entity Central Index Key 0001792044  
Entity File Number 000-56114  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 83-4364296  
Entity Address, Address Line One 235 East 42nd Street,  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 212  
Local Phone Number 733-2323  
Title of 12(b) Security None  
No Trading Symbol Flag true  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company true  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   100