Condensed Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 42.7	$ 37.9
Other comprehensive income (loss) net of tax:
Foreign currency translation adjustments	25.7	(22.7)
Hedging Activities:
Increase (decrease) in fair value of hedging activities, net of tax effects of $1.3 million and $(2.4) million for the three months ended April 2, 2016 and April 4, 2015, respectively	2.3	(3.9)
Reclassification of losses included in net income, net of tax effects of $5.0 million and $2.3 million for the three months ended April 2, 2016 and April 4, 2015, respectively	8.1	3.7
Pension and Post Retirement Plans:
Reclassification adjustments for pension and post retirement benefits included in net income, net of tax effects of $0.2 million and $0.4 million for the three months ended April 2, 2016 and April 4, 2015, respectively	0.7	0.8
Other comprehensive income (loss)	36.8	(22.1)
Comprehensive income	79.5	15.8
Less: Comprehensive income attributable to noncontrolling interests	1.5	0.5
Comprehensive income attributable to Regal Beloit Corporation	$ 78.0	$ 15.3