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Variable Interest Entities Variable Interest Entities (Details) (USD $)
In Millions, unless otherwise specified
Mar. 30, 2012
Variable Interest Entity [Line Items]  
Variable interest entity, total assets $ 42.2
Variable interest entity, total liabilities 8.2
Variable interest entity, long-term debt 4.1
Standby Letters of Credit [Member]
 
Variable Interest Entity [Line Items]  
Letter of credit facility, amount applied to guarantee VIE debt $ 1.0