Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net Sales	$ 822.0	$ 863.9	$ 1,600.2	$ 1,671.8
Cost of Sales	612.8	643.8	1,191.5	1,254.1
Gross Profit	209.2	220.1	408.7	417.7
Operating Expenses	128.1	116.8	251.7	235.3
Income From Operations	81.1	103.3	157.0	182.4
Interest Expense	10.7	11.2	21.3	23.0
Interest Income	1.1	0.4	1.8	0.8
Income Before Taxes	71.5	92.5	137.5	160.2
Provision For Income Taxes	17.9	28.2	33.2	46.0
Net Income	53.6	64.3	104.3	114.2
Less: Net Income Attributable to Noncontrolling Interests	2.5	1.6	3.7	2.8
Net Income Attributable to Regal Beloit Corporation	$ 51.1	$ 62.7	$ 100.6	$ 111.4
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic	$ 1.14	$ 1.50	$ 2.24	$ 2.68
Assuming Dilution	$ 1.13	$ 1.49	$ 2.22	$ 2.65
Cash Dividends Declared	$ 0.20	$ 0.19	$ 0.39	$ 0.37
Weighted Average Number of Shares Outstanding (in millions):
Basic	45.0	41.7	45.0	41.6
Assuming Dilution	45.3	42.0	45.3	42.0