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Document And Entity Information - shares
9 Months Ended
Oct. 01, 2016
Nov. 07, 2016
Document And Entity Information [Abstract]    
Entity Registrant Name REGAL BELOIT CORP  
Entity Central Index Key 0000082811  
Document Type 10-Q  
Document Period End Date Oct. 01, 2016  
Amendment Flag false  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   44,761,519