CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net Sales	$ 853.8	$ 878.8
Cost of Sales	619.2	643.9
Gross Profit	234.6	234.9
Operating Expenses	145.2	146.7
Gain on Divestiture of Business	(41.2)	0.0
Impairments	10.0	0.0
Total Operating Expenses	114.0	146.7
Income From Operations	120.6	88.2
Other Expenses, net	0.1	0.4
Interest Expense	13.6	13.0
Interest Income	1.1	0.2
Income Before Taxes	108.0	75.0
Provision For Income Taxes	21.2	15.7
Net Income	86.8	59.3
Less: Net Income Attributable to Noncontrolling Interests	0.9	0.9
Net Income Attributable to Regal Beloit Corporation	$ 85.9	$ 58.4
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 2.01	$ 1.32
Assuming Dilution (in dollars per share)	$ 1.99	$ 1.31
Weighted Average Number of Shares Outstanding:
Basic (in shares)	42.8	44.2
Assuming Dilution (in shares)	43.1	44.5