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		9 Months Ended
	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2022	Oct. 01, 2021
Numerator:
Net income attributable to Trimble Inc.	$ 85.8	$ 124.0	$ 364.1	$ 377.4
Denominator:
Weighted-average number of common shares used in basic earnings per share (in shares)	247.5	251.8	249.1	251.5
Effect of dilutive securities (in shares)	1.4	2.7	1.7	2.8
Weighted-average number of common shares and dilutive potential common shares used in diluted earnings per share (in shares)	248.9	254.5	250.8	254.3
Basic earnings per share (in usd per share)	$ 0.35	$ 0.49	$ 1.46	$ 1.50
Diluted earnings per share (in usd per share)	$ 0.34	$ 0.49	$ 1.45	$ 1.48
Antidilutive weighted-average (in shares)	1.7	0.1	1.5	0.0