Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Income Statement [Abstract]
Product		$ 1,562.0	$ 1,533.5	$ 1,713.6
Service		430.2	419.9	396.0
Subscription		370.0	337.0	285.9
Total revenues	[1]	2,362.2	2,290.4	2,395.5
Product		760.8	731.1	788.1
Service		169.9	164.2	152.6
Subscription		104.9	100.3	81.1
Amortization of purchased intangible assets		88.6	92.6	82.9
Total cost of sales		1,124.2	1,088.2	1,104.7
Gross margin		1,238.0	1,202.2	1,290.8
Operating expense
Research and development		349.6	336.7	318.0
Sales and marketing		377.6	374.6	387.6
General and administrative		256.0	255.3	247.1
Restructuring charges		11.6	11.4	1.7
Amortization of purchased intangible assets		62.2	69.8	75.6
Total operating expense		1,057.0	1,047.8	1,030.0
Operating income		181.0	154.4	260.8
Non-operating income (expense), net
Interest expense, net		(25.9)	(25.6)	(18.7)
Foreign currency transaction gain (loss), net		(1.9)	0.2	(5.1)
Income from equity method investments, net		17.6	17.9	12.4
Other income, net		5.9	4.9	16.6
Total non-operating income (expense), net		(4.3)	(2.6)	5.2
Income before taxes		176.7	151.8	266.0
Income tax provision		44.5	31.1	52.1
Net income		132.2	120.7	213.9
Less: Net loss attributable to noncontrolling interests		(0.2)	(0.4)	(0.2)
Net income attributable to Trimble Inc.		$ 132.4	$ 121.1	$ 214.1
Basic earnings per share		$ 0.53	$ 0.47	$ 0.82
Shares used in calculating basic earnings per share		250.5	255.8	260.1
Diluted earnings per share		$ 0.52	$ 0.47	$ 0.81
Shares used in calculating diluted earnings per share		253.9	258.5	264.5

[1] Revenue is attributed to countries based on the location of the customer.