Document And Entity Information	6 Months Ended
	Jun. 29, 2013	Aug. 01, 2013
Document Information [Line Items]
Entity Registrant Name	REGAL BELOIT CORP
Entity Central Index Key	0000082811
Document Type	10-Q
Document Period End Date	Jun. 29, 2013
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-30
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,058,652