Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Income Statement [Abstract]
Net Sales	$ 942.2	$ 850.4	$ 1,853.9	$ 1,651.6
Cost of Sales	690.8	639.4	1,381.6	1,246.2
Gross Profit	251.4	211.0	472.3	405.4
Operating Expenses	148.2	122.3	305.5	247.0
Goodwill Impairment	0.0	1.0	0.0	1.0
Total Operating Expenses	148.2	123.3	305.5	248.0
Income From Operations	103.2	87.7	166.8	157.4
Interest Expense	16.4	10.3	30.0	20.7
Interest Income	0.9	1.7	2.1	3.4
Income Before Taxes	87.7	79.1	138.9	140.1
Provision For Income Taxes	22.8	21.0	36.1	37.0
Net Income	64.9	58.1	102.8	103.1
Less: Net Income Attributable to Noncontrolling Interests	2.1	1.9	3.6	3.1
Net Income Attributable to Regal Beloit Corporation	$ 62.8	$ 56.2	$ 99.2	$ 100.0
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic (in dollars per share)	$ 1.40	$ 1.24	$ 2.22	$ 2.22
Assuming Dilution (in dollars per share)	1.39	1.24	2.20	2.20
Cash Dividends Declared Per Share (in dollars per share)	$ 0.23	$ 0.22	$ 0.45	$ 0.42
Weighted Average Number of Shares Outstanding:
Basic (in shares)	44.8	45.2	44.8	45.1
Assuming Dilution (in shares)	45.2	45.5	45.1	45.5