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Document and Entity Information
9 Months Ended
Oct. 03, 2014
Nov. 05, 2014
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 03, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Trading Symbol TRMB  
Entity Registrant Name TRIMBLE NAVIGATION LTD /CA/  
Entity Central Index Key 0000864749  
Current Fiscal Year End Date --01-02  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   259,006,068