Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 01, 2012	Jul. 01, 2012	Jun. 30, 2013	Dec. 31, 2012
Product Information [Line Items]
Cash surrender values, Gross			$ 19.4	$ 19.0
Gross amount of policy loans			17.1	17.4
Cash surrender values, net of policy loans			2.3	1.6
Accounts payable classified correct in accrued expenses		(0.9)
Other operating activitites reclassified to other long-term liabilities		0.7
Software revenue reclassifed to product revenue	1.6	3.1
Cost of revenues reclassified to cost of product revenue	$ 0.9	$ 1.6