CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Income Statement [Abstract]
Net Sales	$ 878.8	$ 813.5
Cost of Sales	643.9	598.0
Gross Profit	234.9	215.5
Operating Expenses	146.7	140.5
Income from Operations	88.2	75.0
Other Expenses, net	0.4	0.2
Interest Expense	13.0	14.4
Interest Income	0.2	1.0
Income before Taxes	75.0	61.4
Provision for Income Taxes	15.7	13.8
Net Income	59.3	47.6
Less: Net Income Attributable to Noncontrolling Interests	0.9	1.3
Net Income Attributable to Regal Beloit Corporation	$ 58.4	$ 46.3
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.32	$ 1.03
Assuming Dilution (in dollars per share)	1.31	1.02
Cash Dividends Declared Per Share (in dollars per share)	$ 0.26	$ 0.24
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.2	44.8
Assuming Dilution (in shares)	44.5	45.1