CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Statement [Abstract]
Total Sales	$ 959.7	$ 869.2	$ 1,838.5	$ 1,682.7
Cost of Sales	712.3	646.4	1,356.2	1,244.4
Gross Profit	247.4	222.8	482.3	438.3
Operating Expenses	147.8	139.6	294.5	280.1
Income From Operations	99.6	83.2	187.8	158.2
Other Expenses, net	0.4	0.2	0.8	0.4
Interest Expense	14.2	14.7	27.2	29.1
Interest Income	0.6	1.0	0.8	2.0
Income Before Taxes	85.6	69.3	160.6	130.7
Provision For Income Taxes	18.3	15.0	34.0	28.8
Net Income	67.3	54.3	126.6	101.9
Less: Net Income Attributable to Noncontrolling Interests	1.4	1.3	2.3	2.6
Net Income Attributable to Regal Beloit Corporation	$ 65.9	$ 53.0	$ 124.3	$ 99.3
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.51	$ 1.19	$ 2.83	$ 2.22
Assuming Dilution (in dollars per share)	1.50	1.18	2.81	2.20
Cash Dividends Declared Per Share (in dollars per share)	$ 0.28	$ 0.26	$ 0.54	$ 0.50
Weighted Average Number of Shares Outstanding:
Basic (in shares)	43.8	44.7	44.0	44.8
Assuming Dilution (in shares)	44.1	45.1	44.3	45.1