CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net Sales	$ 925.4	$ 856.9	$ 2,763.9	$ 2,539.6
Cost of Sales	682.8	630.0	2,039.0	1,874.4
Gross Profit	242.6	226.9	724.9	665.2
Operating Expenses	155.0	132.6	449.5	412.7
Goodwill Impairment	9.5	0.0	9.5	0.0
Asset Impairments	8.7	0.0	8.7	0.0
Total Operating Expenses	173.2	132.6	467.7	412.7
Income From Operations	69.4	94.3	257.2	252.5
Other Expenses, net	0.4	0.3	1.2	0.7
Interest Expense	13.7	13.5	40.9	42.6
Interest Income	1.0	0.7	1.8	2.7
Income Before Taxes	56.3	81.2	216.9	211.9
Provision For Income Taxes	3.6	17.6	37.6	46.4
Net Income	52.7	63.6	179.3	165.5
Less: Net Income Attributable to Noncontrolling Interests	1.4	1.4	3.7	4.0
Net Income Attributable to Regal Beloit Corporation	$ 51.3	$ 62.2	$ 175.6	$ 161.5
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.18	$ 1.40	$ 4.01	$ 3.62
Assuming Dilution (in dollars per share)	1.17	1.39	3.98	3.59
Cash Dividends Declared Per Share (in dollars per share)	$ 0.28	$ 0.26	$ 0.82	$ 0.76
Weighted Average Number of Shares Outstanding:
Basic (in shares)	43.4	44.4	43.8	44.7
Assuming Dilution (in shares)	43.8	44.8	44.1	45.0