Schedule II Regal Beloit Corporation Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Allowance For Receivables [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Year	$ 11.6	$ 11.5	$ 10.2
Charged to Expenses	12.2	19.5	2.7
Deductions	(12.4)	(19.2)	(1.9)
Adjustments	(0.1)	(0.2)	0.5
Balance End of Year	11.3	11.6	11.5
Allowance For Product Warranty Reserves [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Year	19.3	19.3	20.9
Charged to Expenses	20.5	19.6	16.5
Deductions	(21.5)	(20.2)	(19.4)
Adjustments	0.8	0.6	1.3
Balance End of Year	$ 19.1	$ 19.3	$ 19.3