Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Income Statement [Abstract]
Net Sales	$ 882.3	$ 829.8	$ 2,736.2	$ 2,481.4
Cost of Sales	641.2	626.0	2,022.8	1,872.2
Gross Profit	241.1	203.8	713.4	609.2
Operating Expenses	141.0	129.1	446.5	376.1
Goodwill Impairment	0.0	0.0	0.0	1.0
Total Operating Expenses	141.0	129.1	446.5	377.1
Income From Operations	100.1	74.7	266.9	232.1
Interest Expense	15.1	9.8	45.1	30.5
Interest Income	1.0	2.0	3.1	5.4
Income Before Taxes	86.0	66.9	224.9	207.0
Provision For Income Taxes	21.7	18.1	57.8	55.1
Net Income	64.3	48.8	167.1	151.9
Less: Net Income Attributable to Noncontrolling Interests	0.9	1.3	4.5	4.4
Net Income Attributable to Regal Beloit Corporation	$ 63.4	$ 47.5	$ 162.6	$ 147.5
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.42	$ 1.06	$ 3.63	$ 3.27
Assuming Dilution (in dollars per share)	1.41	1.05	3.61	3.25
Cash Dividends Declared Per Share (in dollars per share)	$ 0.23	$ 0.22	$ 0.68	$ 0.64
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.8	44.9	44.8	45.1
Assuming Dilution (in shares)	45.1	45.2	45.1	45.4