Condensed Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Revenue:
Revenue	$ 783.9	$ 795.2	$ 2,440.3	$ 2,322.9
Cost of sales:
Cost of Sales	361.9	368.3	1,119.4	1,077.1
Amortization of purchased intangible assets	23.3	28.2	71.3	75.2
Gross Profit	422.0	426.9	1,320.9	1,245.8
Operating expense:
Research and development	112.3	114.1	350.1	333.5
Sales and marketing	119.7	119.7	375.9	354.6
General and administrative	77.2	91.6	239.9	262.6
Restructuring charges	3.6	2.5	10.0	6.3
Amortization of purchased intangible assets	17.5	21.6	57.3	57.7
Total operating expense	330.3	349.5	1,033.2	1,014.7
Operating income	91.7	77.4	287.7	231.1
Non-operating expense, net:
Interest expense, net	(19.7)	(22.7)	(62.2)	(50.8)
Foreign currency transaction gain (loss), net	(1.5)	(0.1)	(3.4)	0.6
Income from equity method investments, net	8.8	8.8	30.5	23.2
Other income (expense), net	(0.4)	0.7	16.9	5.9
Total non-operating expense, net	(12.8)	(13.3)	(18.2)	(21.1)
Income before taxes	78.9	64.1	269.5	210.0
Income tax provision (benefit)	0.8	(9.6)	34.4	13.5
Net income	78.1	73.7	235.1	196.5
Net gain attributable to noncontrolling interests	0.0	0.0	0.1	0.2
Net income attributable to Trimble Inc.	$ 78.1	$ 73.7	$ 235.0	$ 196.3
Basic earnings per share	$ 0.31	$ 0.29	$ 0.94	$ 0.79
Shares used in calculating basic earnings per share	250.4	250.5	251.2	249.6
Diluted earnings per share	$ 0.31	$ 0.29	$ 0.93	$ 0.78
Shares used in calculating diluted earnings per share	252.1	253.6	253.4	253.0
Product [Member]
Revenue:
Revenue	$ 458.8	$ 499.7	$ 1,468.3	$ 1,528.5
Cost of sales:
Cost of Sales	230.8	237.5	718.5	723.1
Service [Member]
Revenue:
Revenue	168.0	156.5	501.8	421.4
Cost of sales:
Cost of Sales	58.9	64.6	192.2	183.8
Subscription Arrangement [Member]
Revenue:
Revenue	157.1	139.0	470.2	373.0
Cost of sales:
Cost of Sales	$ 48.9	$ 38.0	$ 137.4	$ 95.0