Receivables - Components of Current Finance and Contract Receivables (Detail) - USD ($) $ in Millions	Oct. 03, 2015	Jan. 03, 2015
Receivables [Abstract]
Finance receivables, net of unearned finance charges of $16.6 million and $15.6 million, respectively	$ 443.5	$ 414.6
Contract receivables, net of unearned finance charges of $12.9 million and $13.9 million, respectively	87.4	75.5
Total	530.9	490.1
Allowances for doubtful accounts, finance receivables	(13.1)	(12.2)
Allowances for doubtful accounts, contract receivables	(1.3)	(1.0)
Total	(14.4)	(13.2)
Total current finance and contract receivables - net	516.5	476.9
Finance receivables - net	430.4	402.4
Contract receivables - net	86.1	74.5
Total current finance and contract receivables - net	$ 516.5	$ 476.9