Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net Income	$ 50.7	$ 49.9
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustments	(5.7)	23.7
Change in fair value of hedging activities, net of tax effects of $2.4 million in 2013 and $20.9 million in 2012	3.9	34.6
Reclassification adjustment for losses included in net income, net of tax effects of $0.8 million for the three months ended March 30, 2013 and $3.5 million for the three months ended March 31, 2012	1.2	5.9
Reclassification adjustments for pension benefits included in net income, net of tax effects of $0.3 million and $(0.6) million for the three months ended March 30, 2013 and March 31, 2012, respectively	0.8	(0.9)
Other Comprehensive Income	0.2	63.3
Comprehensive Income	50.9	113.2
Less: Comprehensive Income Attributable to Noncontrolling Interests	0.8	1.7
Comprehensive Income Attributable to Regal Beloit Corporation	$ 50.1	$ 111.5