Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Statement of Comprehensive Income [Abstract]
Net Income	$ 48.8	$ 54.5	$ 151.9	$ 158.8
Other comprehensive income (loss) net of tax:
Foreign currency translation adjustments	(17.2)	6.4	(19.0)	(22.4)
Reclassification of foreign currency translation adjustments included in net income, net of immaterial tax effects for the three and nine months ended September 27, 2014	(1.0)	0	(1.0)	0
Change in fair value of hedging activities, net of tax effects of $(2.2) million and $2.6 million for the three months ended September 27, 2014 and September 28, 2013, and $(3.5) million and $(3.0) million for the nine months ended September 27, 2014 and September 28, 2013, respectively	(3.7)	4.4	(5.7)	(4.8)
Reclassification adjustment for losses included in net income, net of tax effects of $0.4 million and $2.5 million for the three months ended September 27, 2014 and September 28, 2013, and $3.6 million and $3.4 million for the nine months ended September 27, 2014 and September 28, 2013, respectively	0.8	4.0	5.9	5.5
Increase in prior service cost and unrecognized loss, net of immaterial tax effects for the nine months ended September 27, 2014	0	0	(0.5)	0
Reclassification adjustments for pension benefits included in net income, net of tax effects of $0.3 and $0.4 million for the three months ended September 27, 2014 and September 28, 2013, and $0.7 million and $0.7 million for the nine months ended September 27, 2014 and September 28, 2013, respectively	0.5	0.5	1.2	1.1
Other comprehensive income (loss)	(20.6)	15.3	(19.1)	(20.6)
Comprehensive income	28.2	69.8	132.8	138.2
Less: Comprehensive income attributable to noncontrolling interest	0.6	2.8	2.8	5.5
Comprehensive Income Attributable to Regal Beloit Corporation	$ 27.6	$ 67.0	$ 130.0	$ 132.7