Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net Sales	$ 778.2	$ 807.9
Cost of Sales	578.7	610.3
Gross Profit	199.5	197.6
Operating Expenses	123.6	118.5
Income From Operations	75.9	79.1
Interest Expense	10.6	11.8
Interest Income	0.7	0.4
Income Before Taxes	66.0	67.7
Provision For Income Taxes	15.3	17.8
Net Income	50.7	49.9
Less: Net Income Attributable to Noncontrolling Interests	1.2	1.2
Net Income Attributable to Regal Beloit Corporation	$ 49.5	$ 48.7
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic	$ 1.10	$ 1.17
Assuming Dilution	$ 1.09	$ 1.16
Cash Dividends Declared	$ 0.19	$ 0.18
Weighted Average Number of Shares Outstanding (in millions):
Basic	45.0	41.6
Assuming Dilution	45.3	42.0