Accounts Receivable - Components of Current Finance and Contract Receivables (Detail) (USD $) In Millions, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Receivables [Abstract]
Finance receivables, net of unearned finance charges of $13.6 million and $8.4 million, respectively	$ 378.1	$ 331.7
Contract receivables, net of unearned finance charges of $12.4 million and $9.3 million, respectively	74.5	63.7
Total	452.6	395.4
Allowances for doubtful accounts, finance receivables	(10.7)	(8.6)
Allowances for doubtful accounts, contract receivables	(1.4)	(1.0)
Total	(12.1)	(9.6)
Total current finance and contract receivables - net	440.5	385.8
Finance receivables - net	367.4	323.1
Contract receivables - net	73.1	62.7
Total current finance and contract receivables - net	$ 440.5	$ 385.8