Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Net Sales	$ 863.9	$ 681.8	$ 1,671.8	$ 1,344.4
Cost of Sales	643.8	531.1	1,254.1	1,028.9
Gross Profit	220.1	150.7	417.7	315.5
Operating Expenses	116.8	95.9	235.3	196.6
Income From Operations	103.3	54.8	182.4	118.9
Interest Expense	11.2	4.8	23.0	9.9
Interest Income	0.4	0.4	0.8	0.7
Income Before Taxes	92.5	50.4	160.2	109.7
Provision For Income Taxes	28.2	14.4	46.0	32.9
Net Income	64.3	36.0	114.2	76.8
Less: Net Income Attributable to Noncontrolling Interests	1.6	1.7	2.8	3.6
Net Income Attributable to Regal Beloit Corporation	$ 62.7	$ 34.3	$ 111.4	$ 73.2
Earnings Per Share Attributable to Regal Beloit Corporation:
Basic	$ 1.50	$ 0.89	$ 2.68	$ 1.89
Assuming Dilution	$ 1.49	$ 0.88	$ 2.65	$ 1.87
Cash Dividends Declared	$ 0.19	$ 0.18	$ 0.37	$ 0.35
Weighted Average Number of Shares Outstanding (in millions):
Basic	41.7	38.7	41.6	38.6
Assuming Dilution	42.0	39.2	42.0	39.2