CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Income Statement [Abstract]
Net Sales	$ 772.3	$ 925.4	$ 2,499.8	$ 2,763.9
Cost of Sales	570.4	682.8	1,829.3	2,039.0
Gross Profit	201.9	242.6	670.5	724.9
Operating Expenses	128.9	155.0	416.3	449.5
Loss (Gain) on Divestiture of Businesses	0.2	0.0	(45.2)	0.0
Goodwill Impairment	0.0	9.5	0.0	9.5
Asset Impairments	0.0	8.7	10.0	8.7
Total Operating Expenses	129.1	173.2	381.1	467.7
Income from Operations	72.8	69.4	289.4	257.2
Other Expenses, net	0.1	0.4	0.4	1.2
Interest Expense	13.5	13.7	40.5	40.9
Interest Income	1.5	1.0	4.0	1.8
Income before Taxes	60.7	56.3	252.5	216.9
Provision for Income Taxes	9.9	3.6	47.5	37.6
Net Income	50.8	52.7	205.0	179.3
Less: Net Income Attributable to Noncontrolling Interests	1.1	1.4	2.8	3.7
Net Income Attributable to Regal Beloit Corporation	$ 49.7	$ 51.3	$ 202.2	$ 175.6
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.20	$ 1.18	$ 4.78	$ 4.01
Assuming Dilution (in dollars per share)	$ 1.19	$ 1.17	$ 4.75	$ 3.98
Weighted Average Number of Shares Outstanding:
Basic (in shares)	41.5	43.4	42.3	43.8
Assuming Dilution (in shares)	41.7	43.8	42.6	44.1