CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Income Statement [Abstract]
Net Sales	$ 869.2	$ 838.6	$ 1,682.7	$ 1,656.8
Cost of Sales	646.2	615.7	1,244.1	1,216.5
Gross Profit	223.0	222.9	438.6	440.3
Operating Expenses	140.0	131.5	280.8	279.6
Income From Operations	83.0	91.4	157.8	160.7
Interest Expense	14.7	14.8	29.1	29.8
Interest Income	1.0	1.2	2.0	2.3
Income Before Taxes	69.3	77.8	130.7	133.2
Provision For Income Taxes	15.0	19.4	28.8	32.1
Net Income	54.3	58.4	101.9	101.1
Less: Net Income Attributable to Noncontrolling Interests	1.3	1.8	2.6	2.9
Net Income Attributable to Regal Beloit Corporation	$ 53.0	$ 56.6	$ 99.3	$ 98.2
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.19	$ 1.27	$ 2.22	$ 2.20
Assuming Dilution (in dollars per share)	1.18	1.26	2.20	2.19
Cash Dividends Declared Per Share (in dollars per share)	$ 0.26	$ 0.24	$ 0.50	$ 0.47
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.7	44.7	44.8	44.7
Assuming Dilution (in shares)	45.1	45.0	45.1	45.0