Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Net of Tax	$ 2.4	$ 2.1	$ 1.7
Net Income	200.3	158.0	154.7
Other Comprehensive Income (Loss) net of tax:
Currency translation adjustments	14.7	(43.6)	29.4
Change in fair value of hedging activities, net of tax effects of $(27,405) in 2011, $11,045 in 2010 and $18,844 in 2009	16.6	(44.7)	18.0
Hedging Activities Reclassified into Earnings from Other Comprehensive Income, net of tax effects of $(5,458) in 2011, $1,976 in 2010 and $30,455 in 2009	16.8	(8.9)	3.2
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	33.4	(53.6)	21.2
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	(7.5)	(6.7)	(2.6)
Total Other Comprehensive Income (Loss)	40.6	(103.9)	48.0
Less: Comprehensive Income Attributable to Noncontrolling Interests	5.4	5.3	6.4
Comprehensive Income Attributable to Regal Beloit Corporation	240.9	54.1	202.7
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 235.5	$ 48.8	$ 196.3