Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
Revenue	$ 3,264.3	$ 3,108.4	$ 2,646.5
Cost of Sales	1,483.4	1,427.4	1,268.9
Amortization of purchased intangible assets	94.1	103.2	85.8
Gross margin	1,780.9	1,681.0	1,377.6
Operating expense:
Research and development	469.7	446.1	370.2
Sales and marketing	504.2	479.8	400.1
General and administrative	330.6	349.8	301.7
Restructuring charges	26.8	8.2	6.9
Amortization of purchased intangible assets	73.7	76.4	63.0
Total operating expense	1,405.0	1,360.3	1,141.9
Operating income	375.9	320.7	235.7
Non-operating income (expense), net:
Interest expense, net	(82.4)	(73.2)	(25.2)
Income from equity method investments, net	35.8	28.7	29.5
Other income, net	15.5	1.8	8.2
Total non-operating income (expense), net	(31.1)	(42.7)	12.5
Income before taxes	344.8	278.0	248.2
Income tax provision (benefit)	(169.7)	(5.3)	129.7
Net income	514.5	283.3	118.5
Net gain attributable to noncontrolling interests	0.2	0.5	0.1
Net income attributable to Trimble Inc.	$ 514.3	$ 282.8	$ 118.4
Basic earnings per share	$ 2.05	$ 1.13	$ 0.47
Shares used in calculating basic earnings per share	250.8	250.0	252.1
Diluted earnings per share	$ 2.03	$ 1.12	$ 0.46
Shares used in calculating diluted earnings per share	252.9	253.4	256.7
Product [Member]
Revenue	$ 1,934.8	$ 1,999.9	$ 1,763.8
Cost of Sales	939.4	938.9	875.6
Service [Member]
Revenue	686.2	588.7	475.4
Cost of Sales	253.9	247.3	194.4
Subscription [Member]
Revenue	643.3	519.8	407.3
Cost of Sales	$ 196.0	$ 138.0	$ 113.1