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		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
Net income 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
APIC, Share-based Payment Arrangement, Recognition and Exercise				(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
Common stock, shares outstanding	249.9	249.9
Total stockholders' equity at Jan. 03, 2020	$ 3,120.4	$ 0.2	1,692.8	1,602.8	(176.8)	3,119.0	1.4
Net income attributable to Trimble Inc.	61.9					61.9
Net income attributable to noncontrolling interests	0.0
Net income	61.9
Other Comprehensive Income	(54.1)				(54.1)	(54.1)
Comprehensive Income attributable to Parent	7.8
Comprehensive income	7.8
Issuance of common stock under employee plans, net of tax withholdings, Shares		1.0
Issuance of common stock under employee plans, net of tax withholdings, Value	12.7		20.4			12.7
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation				(7.7)
Stock Repurchases, Shares		(1.2)
Stock Repurchases, Value	(50.0)		(8.4)	(41.6)		(50.0)
Stock-based Compensation	11.8		11.8			11.8
Noncontrolling Interest Investments			0.0			0.0
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(0.4)						(0.4)
Total stockholders' equity at Apr. 03, 2020	$ 3,102.3	$ 0.2	$ 1,716.6	$ 1,615.4	$ (230.9)	$ 3,101.3	$ 1.0
Common stock, shares outstanding	249.7	249.7