Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]
Common stock, shares outstanding		248.9
Total stockholders' equity at Dec. 29, 2017	$ 2,414.5	$ 0.2	$ 1,461.1	$ 1,084.6	$ (131.4)	$ 2,414.5	$ 0.0
Net income attributable to Trimble Inc.	58.5					58.5
Net gain attributable to noncontrolling interests	0.2
Net income	58.7
Other Comprehensive Income	30.3				30.3	30.3
Comprehensive Income attributable to Parent	88.8
Comprehensive income	89.0
Issuance of common stock under employee plans, net of tax withholdings, Shares		1.1
Issuance of common stock under employee plans, net of tax withholdings, Value	28.8		25.8			28.8
Adjustments Related to Tax Withholding for Share-based Compensation				3.0
Stock Repurchases, Shares		(1.3)
Stock Repurchases, Value	(50.0)		(7.5)	(42.5)		(50.0)
Stock-based Compensation	17.6		17.6			17.6
Total stockholders' equity at Mar. 30, 2018	$ 2,499.9	$ 0.2	1,497.0	1,103.6	(101.1)	2,499.7	0.2
Common stock, shares outstanding		248.7
Common stock, shares outstanding	250.9	250.9
Total stockholders' equity at Dec. 28, 2018	$ 2,674.8	$ 0.3	1,591.9	1,268.3	(186.1)	2,674.4	0.4
Net income attributable to Trimble Inc.	62.3			62.3		62.3
Net gain attributable to noncontrolling interests	0.1
Net income	62.4
Other Comprehensive Income	3.6				3.6	3.6
Comprehensive Income attributable to Parent	65.9
Comprehensive income	66.0
Issuance of common stock under employee plans, net of tax withholdings, Shares		1.6
Issuance of common stock under employee plans, net of tax withholdings, Value	25.6		33.3			25.6
Adjustments Related to Tax Withholding for Share-based Compensation				(7.7)
Stock Repurchases, Shares		(1.0)
Stock Repurchases, Value	(40.0)		(6.5)	(33.5)		(40.0)
Stock-based Compensation	16.6		16.6			16.6
Noncontrolling Interest Investments	0.0		(0.8)			(0.8)	0.8
Total stockholders' equity at Mar. 29, 2019	$ 2,743.0	$ 0.3	$ 1,634.5	$ 1,289.4	$ (182.5)	$ 2,741.7	$ 1.3
Common stock, shares outstanding	251.5	251.5