Employee Pension and Profit Sharing Plans - Assumptions (Details)	12 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Assumptions Used to Calculate Pension Expense [Abstract]
Discount rate	5.00%	5.20%
Rate of compensation increase	3.50%	3.50%
Long-term rate of return on assets	6.60%	6.80%
Assumptions Used to Calculate Funded Status [Abstract]
Discount rate	4.20%	5.00%
Rate of compensation increase	3.40%	3.50%