Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Income Statement [Abstract]
Net Sales	$ 829.8	$ 768.2	$ 2,481.4	$ 2,368.4
Cost of Sales	626.0	571.7	1,872.2	1,763.2
Gross Profit	203.8	196.5	609.2	605.2
Operating Expenses	129.1	117.7	377.1	369.4
Other Cost and Expense, Operating	129.1	117.7	376.1	369.4
Asset Impairment Charges	0	0	1.0	0
Income From Operations	74.7	78.8	232.1	235.8
Interest Expense	9.8	10.6	30.5	31.9
Interest Income	2.0	1.3	5.4	3.1
Income Before Taxes	66.9	69.5	207.0	207.0
Provision For Income Taxes	18.1	15.0	55.1	48.2
Net Income	48.8	54.5	151.9	158.8
Less: Net Income Attributable to Noncontrolling Interests	1.3	1.9	4.4	5.6
Net Income Attributable to Regal Beloit Corporation	$ 47.5	$ 52.6	$ 147.5	$ 153.2
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic	$ 1.06	$ 1.17	$ 3.27	$ 3.40
Assuming Dilution	$ 1.05	$ 1.16	$ 3.25	$ 3.38
Cash Dividends Declared	$ 0.22	$ 0.20	$ 0.64	$ 0.59
Weighted Average Number of Shares Outstanding (in millions):
Basic	44.9	45.1	45.1	45.0
Assuming Dilution	45.2	45.4	45.4	45.3