Document And Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 28, 2018
Feb. 19, 2019
Jun. 29, 2018
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 28, 2018    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2018    
Entity Registrant Name TRIMBLE INC.    
Entity Central Index Key 0000864749    
Current Fiscal Year End Date --12-28    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   251,514,221  
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 8.2
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false