CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 54.3	$ 58.4	$ 101.9	$ 101.1
Other Comprehensive Income (Loss) Net of Tax:
Foreign Currency Translation Adjustments	39.1	(32.5)	68.5	(6.8)
Hedging Activities:
Increase (Decrease) in Fair Value of Hedging Activities, Net of Tax Effects of $ 6.1 Million and $(6.7) Million for the Three Months ended July 1, 2017 and July 2, 2016 and $18.0 Million and $(5.4) Million for the Six Months ended July 1, 2017 and July 2, 2016 Respectively	10.0	(11.1)	29.4	(8.8)
Reclassification of Losses included in Net Income, Net of Tax Effects of $1.8 Million and $4.7 Million for the Three Months ended July 1, 2017 and July 2, 2016 and $6.2 Million and $9.7 Million for the Six Months ended July 1, 2017 and July 2, 2016 Respectively	2.7	7.6	10.0	15.7
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 July 1, 2017 and July 2, 2016 and $0.4 Million and $0.6 Million for the Six Months Ended July 1, 2017 and July 2, 2016, Respectively	0.4	0.6	0.8	1.3
Other Comprehensive Income (Loss)	52.2	(35.4)	108.7	1.4
Comprehensive Income	106.5	23.0	210.6	102.5
Less: Comprehensive Income Attributable to Noncontrolling Interests	1.8	0.9	3.6	2.4
Comprehensive Income Attributable to Regal Beloit Corporation	$ 104.7	$ 22.1	$ 207.0	$ 100.1