Earnings Per Share (Schedule Of Computation Of Earnings Per Share And Effect On Weighted-Average Number Of Shares) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Numerator:
Net income attributable to Trimble Inc.	$ 168.0	$ 138.9	$ 278.3	$ 253.4
Denominator:
Weighted-average number of common shares used in basic earnings per share (in shares)	249.2	251.5	250.0	251.3
Effect of dilutive securities (in shares)	1.5	2.7	1.7	2.9
Weighted-average number of common shares used in diluted earnings per share (in shares)	250.7	254.2	251.7	254.2
Basic earnings per share (in usd per share)	$ 0.67	$ 0.55	$ 1.11	$ 1.01
Diluted earnings per share (in usd per share)	$ 0.67	$ 0.55	$ 1.11	$ 1.00
Antidilutive weighted-average (in shares)	2.1	0.1	1.5	0.2