Document and Entity Information - shares	9 Months Ended
	Sep. 28, 2018	Nov. 02, 2018
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 28, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	TRMB
Entity Registrant Name	TRIMBLE INC.
Entity Central Index Key	0000864749
Current Fiscal Year End Date	--12-28
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		251,146,789