Condensed Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017		Jun. 29, 2018	Jun. 30, 2017
Revenue:
Revenue	$ 785.5	$ 659.9	[1],[2],[3]	$ 1,527.7	$ 1,270.5	[1],[2],[3]
Cost of sales:
Cost of Sales	362.8	317.3	[2]	708.8	603.6	[2]
Amortization of purchased intangible assets	23.9	20.5	[2]	47.0	39.5	[2]
Gross Profit	422.7	342.6	[2]	818.9	666.9	[2]
Operating expense:
Research and development	110.1	90.8	[2]	219.4	179.5	[2]
Sales and marketing	112.8	100.1	[2]	234.9	194.5	[2]
General and administrative	89.4	75.1	[2]	171.0	144.4	[2]
Restructuring charges	2.2	2.3	[2]	3.8	5.2	[2]
Amortization of purchased intangible assets	18.7	15.3	[2]	36.1	29.6	[2]
Total operating expense	333.2	283.6	[2]	665.2	553.2	[2]
Operating income	89.5	59.0	[2],[4]	153.7	113.7	[2],[4]
Non-operating income (expense), net:
Interest expense, net	(18.6)	(6.0)	[2]	(28.1)	(12.1)	[2]
Foreign currency transaction gain (loss), net	(3.0)	0.0	[2]	0.7	1.4	[2]
Income from equity method investments, net	9.5	9.9	[2]	14.4	14.1	[2]
Other income, net	1.8	1.1	[2]	5.2	10.6	[2]
Total non-operating income (expense), net	(10.3)	5.0	[2],[4]	(7.8)	14.0	[2],[4]
Income before taxes	79.2	64.0	[2],[4]	145.9	127.7	[2],[4]
Income tax provision	15.1	16.7	[2]	23.1	30.6	[2]
Net income	64.1	47.3	[2],[5]	122.8	97.1	[2],[5],[6]
Net gain attributable to noncontrolling interests	0.0	0.0	[5]	0.2	0.0	[5]
Net income attributable to Trimble Inc.	$ 64.1	$ 47.3	[2]	$ 122.6	$ 97.1	[2]
Basic earnings per share	$ 0.26	$ 0.19	[2]	$ 0.49	$ 0.38	[2]
Shares used in calculating basic earnings per share	249.5	253.0	[2]	249.1	252.5	[2]
Diluted earnings per share	$ 0.25	$ 0.18	[2]	$ 0.49	$ 0.38	[2]
Shares used in calculating diluted earnings per share	252.2	257.1	[2]	252.7	256.5	[2]
Product [Member]
Revenue:
Revenue	$ 531.0	$ 445.4	[2]	$ 1,028.8	$ 855.0	[2]
Cost of sales:
Cost of Sales	250.2	222.4	[2]	485.6	415.8	[2]
Service [Member]
Revenue:
Revenue	136.1	111.9	[2]	264.9	218.5	[2]
Cost of sales:
Cost of Sales	59.6	47.2	[2]	119.2	94.2	[2]
Subscription Arrangement [Member]
Revenue:
Revenue	118.4	102.6	[2]	234.0	197.0	[2]
Cost of sales:
Cost of Sales	$ 29.1	$ 27.2	[2]	$ 57.0	$ 54.1	[2]

[1] Adjusted to reflect adoption of the new revenue recognition standard, Revenue from Contracts with Customers. For further information, see Note 2.

[2] See Note 2 for a summary of adjustments

[3] See Note 2 for a summary of adjustments

[4] See Note 2 for a summary of adjustments

[5] See Note 2 for a summary of adjustments

[6] See Note 2 for a summary of adjustments