Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	Jun. 29, 2012
Variable Interest Entity [Line Items]
Variable interest entity, total assets	$ 42.7
Variable interest entity, total liabilities	8.9
Variable interest entity, long-term debt	3.7
Standby Letters of Credit [Member]
Variable Interest Entity [Line Items]
Letter of credit facility, amount applied to guarantee VIE debt	$ 1.0