Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 492.8	$ 390.6	$ 514.5
Foreign currency translation adjustments, net of tax $1.0 in 2021, $0.5 in 2020, and $0.1 in 2019	(64.0)	77.1	10.3
Net unrealized gain (loss), net of tax	0.8	1.2	(1.0)
Comprehensive income	429.6	468.9	523.8
Comprehensive income attributable to noncontrolling interests	0.1	0.7	0.2
Comprehensive income attributable to Trimble Inc.	$ 429.5	$ 468.2	$ 523.6