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Summary of Significant Accounting Policies Sabbatical Leave (Details) (USD $)	Dec. 29, 2012	Dec. 31, 2011
Compensated Absences Liability, Sabbatical Leave	$ 1,000,000	$ 900,000
Minimum [Member]
Compensated Absences Liability, Sabbatical Leave	$ 10

Amount of liability accrued for the employer's obligation related to an employee's right to receive compensation during a future sabbatical leave. This amount does not include amounts accrued for the employee's future vacation and holidays.

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