Condensed Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 47.6	$ 42.7
Other Comprehensive Income Net of Tax:
Foreign Currency Translation Adjustments	29.4	25.7
Hedging Activities:
Increase in Fair Value of Hedging Activities, Net of Tax Effects of $11.9 Million and $1.3 Million for the Three Months Ended April 1, 2017 and April 2, 2016, Respectively	19.4	2.3
Reclassification of Losses Included in Net Income, Net of Tax Effects of $4.4 Million and $5.0 Million for the Three Months Ended April 1, 2017 and April 2, 2016, Respectively	7.3	8.1
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 $0.2 Million for the Three Months Ended April 1, 2017 and April 2, 2016, Respectively	0.4	0.7
Other Comprehensive Income	56.5	36.8
Comprehensive Income	104.1	79.5
Less: Comprehensive Income Attributable to Noncontrolling Interests	1.8	1.5
Comprehensive Income Attributable to Regal Beloit Corporation	$ 102.3	$ 78.0