Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	[2]	Jun. 29, 2018	Jun. 30, 2017	[2]
Net income	$ 64.1	$ 47.3	[1]	$ 122.8	$ 97.1	[1],[3]
Foreign currency translation adjustments, net of tax	(60.5)	35.6		(30.2)	61.3
Net unrealized gain (loss) on short-term investments	0.2	0.0		0.2	(0.1)
Net unrealized actuarial gain (loss), net of tax	0.2	(0.1)		0.2	(0.2)
Comprehensive income	4.0	82.8		93.0	158.1
Comprehensive gain attributable to noncontrolling interests	0.0	0.0		0.2	0.0
Comprehensive income attributable to Trimble Inc.	$ 4.0	$ 82.8		$ 92.8	$ 158.1

[1] See Note 2 for a summary of adjustments

[2] See Note 2 for a summary of adjustments

[3] See Note 2 for a summary of adjustments