Schedule of Available for Sale Securities by Contractual Maturity (Detail) (USD $) In Millions, unless otherwise specified	Jun. 29, 2014
Investments Classified by Contractual Maturity Date [Line Items]
Due in one year or less, amortized cost	$ 0.2
Due after one year through three years, amortized cost	0.4
Due after three years through ten years, amortized cost	1.1
Due after ten years, amortized cost	0.5
Total available for sale securities, amortized cost	2.2
Due in one year or less, market value	0.2
Due after one year through three years, market value	0.4
Due after three years through ten years, market value	1.3
Due after ten years, market value	0.5
Market Value	$ 2.4