Condensed Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 61.1	$ 64.3	$ 162.2	$ 167.1
Other comprehensive income (loss) net of tax:
Foreign currency translation adjustments	(2.4)	(36.8)	(9.2)	(67.3)
Hedging Activities:
Decrease in fair value of hedging activities, net of tax effects of $(3.8) million and $(14.5) million for the three months ended October 1, 2016 and October 3, 2015 and $(9.2) million and $(21.9) million for the nine months ended October 1, 2016 and October 3, 2015 respectively	(6.3)	(23.6)	(15.1)	(35.7)
Reclassification of losses included in net income, net of tax effects of $4.6 million and $4.1 million for the three months ended October 1, 2016 and October 3, 2015 and $14.3 million and $10.6 million for the nine months ended October 1, 2016 and October 3, 2015 respectively	7.7	6.9	23.4	17.4
Pension and Post Retirement Plans:
Reclassification adjustments for pension and post retirement benefits included in net income, net of tax effects of $0.3 million and $0.3 million for the three months ended October 1, 2016 and October 3, 2015 and $0.9 million and $1.8 million for the nine months ended October 1, 2016 and October 3, 2015, respectively	0.5	0.7	1.8	1.2
Other comprehensive income (loss)	(0.5)	(52.8)	0.9	(84.4)
Comprehensive income	60.6	11.5	163.1	82.7
Less: Comprehensive income (loss) attributable to noncontrolling interests	1.6	(0.1)	4.0	2.3
Comprehensive income attributable to Regal Beloit Corporation	$ 59.0	$ 11.6	$ 159.1	$ 80.4