CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Net Sales	$ 734.2	$ 853.8
Cost of Sales	530.9	619.2
Gross Profit	203.3	234.6
Operating Expenses	131.9	145.2
Gain on Divestiture of Businesses	(0.1)	(41.2)
Asset Impairments	1.5	10.0
Total Operating Expenses	133.3	114.0
Other (Income) Expenses, net	70.0	120.6
Other (Income) Expenses, net	(1.1)	0.1
Interest Expense	11.6	13.6
Interest Income	1.1	1.1
Income before Taxes	60.6	108.0
Provision for Income Taxes	13.9	21.2
Net Income	46.7	86.8
Less: Net Income Attributable to Noncontrolling Interests	0.9	0.9
Net Income Attributable to Regal Beloit Corporation	$ 45.8	$ 85.9
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.13	$ 2.01
Assuming Dilution (in dollars per share)	$ 1.12	$ 1.99
Weighted Average Number of Shares Outstanding:
Basic (in shares)	40.6	42.8
Assuming Dilution (in shares)	40.8	43.1