Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 28, 2018	Dec. 29, 2017		Dec. 30, 2016
Net income	[1]	$ 283.3	$ 118.5		$ 132.2
Foreign currency translation adjustments, net of tax $0.1 in 2018, $3.7 in 2017, and $(0.2) in 2016		(55.6)	90.9	[1]	(55.2)	[1]
Net unrealized gain (loss) on short-term investments, net of tax		0.2	(0.2)	[1]
Net unrealized actuarial gain (loss), net of tax		0.7	(0.3)	[1]	0.3	[1]
Comprehensive income	[1]	228.6	208.9		77.3
Comprehensive gain (loss) attributable to noncontrolling interests		0.5	0.1	[1]	(0.2)	[1]
Comprehensive income attributable to Trimble Inc.		$ 228.1	$ 208.8	[1]	$ 77.5	[1]

[1] See Note 2 for a summary of adjustments