Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Income Statement [Abstract]
Net Sales	$ 813.5	$ 818.2
Cost of Sales	597.9	600.8
Gross Profit	215.6	217.4
Operating Expenses	140.8	148.1
Income From Operations	74.8	69.3
Interest Expense	14.4	15.0
Interest Income	1.0	1.1
Income Before Taxes	61.4	55.4
Provision For Income Taxes	13.8	12.7
Net Income	47.6	42.7
Less: Net Income Attributable to Noncontrolling Interests	1.3	1.1
Net Income Attributable to Regal Beloit Corporation	$ 46.3	$ 41.6
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.03	$ 0.93
Assuming Dilution (in dollars per share)	1.02	0.93
Cash Dividends Declared Per Share (in dollars per share)	$ 0.24	$ 0.23
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.8	44.7
Assuming Dilution (in shares)	45.1	45.0