Revisions to Previously Reported Financial Information (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 01, 2016	Apr. 03, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 19.7	$ 34.0
Foreign currency translation adjustments	28.2	(70.3)
Net unrealized actuarial gain	(0.1)	0.1
Comprehensive Income (Loss)	47.8	(36.2)
Less: Comprehensive loss attributable to noncontrolling interests	(0.1)	(0.1)
Comprehensive Income (Loss) attributable to Trimble Navigation Ltd.	$ 47.9	(36.1)
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		34.0
Foreign currency translation adjustments		(67.2)
Net unrealized actuarial gain		0.1
Comprehensive Income (Loss)		(33.1)
Less: Comprehensive loss attributable to noncontrolling interests		(0.1)
Comprehensive Income (Loss) attributable to Trimble Navigation Ltd.		(33.0)
Scenario, Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		0.0
Foreign currency translation adjustments		(3.1)
Net unrealized actuarial gain		0.0
Comprehensive Income (Loss)		(3.1)
Less: Comprehensive loss attributable to noncontrolling interests		0.0
Comprehensive Income (Loss) attributable to Trimble Navigation Ltd.		$ (3.1)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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