Condensed Consolidated Statements Of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Oct. 01, 2021	Oct. 02, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 124.0	$ 84.8	$ 377.5	$ 209.9
Foreign currency translation adjustments, net of tax	(28.7)	37.3	(42.1)	15.6
Net unrealized gain, net of tax	0.0	0.0	0.0	0.2
Comprehensive income	95.3	122.1	335.4	225.7
Comprehensive income attributable to noncontrolling interests	0.0	0.1	0.1	0.3
Comprehensive income attributable to Trimble Inc.	$ 95.3	$ 122.0	$ 335.3	$ 225.4