CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 235.8	$ 218.1	$ 209.3
Translation:
Foreign Currency Translation Adjustments	(71.2)	103.1	(68.2)
Hedging Activities:
Increase (Decrease) in Fair Value of Hedging Activities, Net of Tax Effects of $(1.2) Million in 2018, $26.1 Million in 2017 and $(15.2) Million in 2016	(4.0)	42.4	(24.8)
Reclassification of (Gains) Losses Included in Net Income, Net of Tax Effects of $(3.8) Million in 2018, $4.5 Million in 2017, and $19.1 Million in 2016	(12.0)	7.3	31.2
Hedging Activities	(16.0)	49.7	6.4
Pension and Post Retirement Plans:
Decrease (Increase) in Prior Service Cost and Unrecognized Gain (Loss), Net of Tax Effects of $(0.6) Million in 2018, $0.4 Million in 2017 and $(1.5) Million in 2016	(1.9)	1.8	(2.8)
Amortization of Prior Service Cost and Unrecognized Loss Included in Net Periodic Pension Cost, Net of Tax Effects of $0.8 Million in 2018, $0.9 Million in 2017 and $1.2 Million in 2016	2.9	1.6	2.2
Amortization of Prior Service Cost and Unrecognized Loss Included in Net Periodic Pension Cost, Net of Tax Effects of $0.8 Million in 2018, $0.9 Million in 2017 and $1.2 Million in 2016	1.0	3.4	(0.6)
Other Comprehensive Income (Loss)	(86.2)	156.2	(62.4)
Comprehensive Income	149.6	374.3	146.9
Less: Comprehensive Income Attributable to Noncontrolling Interest	2.8	7.2	3.9
Comprehensive Income Attributable to Regal Beloit Corporation	$ 146.8	$ 367.1	$ 143.0