CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net Sales	$ 873.7	$ 959.7	$ 1,727.5	$ 1,838.5
Cost of Sales	639.7	712.3	1,258.9	1,356.2
Gross Profit	234.0	247.4	468.6	482.3
Operating Expenses	142.2	147.8	287.4	294.5
Gain on Divestiture of Businesses	(4.2)	0.0	(45.4)	0.0
Impairments	0.0	0.0	10.0	0.0
Total Operating Expenses	138.0	147.8	252.0	294.5
Income from Operations	96.0	99.6	216.6	187.8
Other Expenses, net	0.2	0.4	0.3	0.8
Interest Expense	13.4	14.2	27.0	27.2
Interest Income	1.4	0.6	2.5	0.8
Income Before Taxes	83.8	85.6	191.8	160.6
Provision For Income Taxes	16.4	18.3	37.6	34.0
Net Income	67.4	67.3	154.2	126.6
Less: Net Income Attributable to Noncontrolling Interests	0.8	1.4	1.7	2.3
Net Income Attributable to Regal Beloit Corporation	$ 66.6	$ 65.9	$ 152.5	$ 124.3
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.56	$ 1.51	$ 3.57	$ 2.83
Assuming Dilution (in dollars per share)	$ 1.55	$ 1.50	$ 3.54	$ 2.81
Weighted Average Number of Shares Outstanding:
Basic (in shares)	42.6	43.8	42.7	44.0
Assuming Dilution (in shares)	43.0	44.1	43.0	44.3