CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Income Statement [Abstract]
Net Sales	$ 3,360.3	$ 3,224.5	$ 3,509.7
Cost of Sales	2,476.2	2,359.3	2,576.5
Gross Profit	884.1	865.2	933.2
Operating Expenses	554.0	544.6	600.5
Goodwill Impairment	0.0	0.0	79.9
Total Operating Expenses	554.0	544.6	680.4
Income from Operations	330.1	320.6	252.8
Interest Expense	56.1	58.7	60.2
Interest Income	3.2	4.5	4.3
Income before Taxes	277.2	266.4	196.9
Provision for Income Taxes	59.1	57.1	48.4
Net Income	218.1	209.3	148.5
Less: Net Income Attributable to Noncontrolling Interests	5.1	5.9	5.2
Net Income Attributable to Regal Beloit Corporation	$ 213.0	$ 203.4	$ 143.3
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per shares)	$ 4.78	$ 4.55	$ 3.21
Assuming Dilution (in dollars per share)	$ 4.74	$ 4.52	$ 3.18
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.6	44.7	44.7
Assuming Dilution (in shares)	44.9	45.0	45.1