Long-Term Debt (Details 2) (USD $)	12 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 25, 2010
Long-term debt
Interest rate terms	interest at a rate equal to an applicable margin plus, at the Company's option, either (a) a eurodollar rate determined by reference to the cost of funds for deposits for the interest period and currency relevant to such borrowing, adjusted for certain costs, or (b) a base rate determined by reference to the highest of (1) the federal funds rate plus %, (2) the prime rate announced by Bank of America, N.A. from time to time and (3) the eurodollar rate plus %
Average effective interest rate (as a percent)	2.90%	2.80%
Commitment fee on revolving credit facilities (as a percent)	0.20%
Debt issuance cost		$ 46,009,000	$ 1,339,000
Loss on extinguishment of debt		(19,732,000)
Interest rate cap
Long-term debt
Variable interest rate borrowings	167,000,000
Swap
Long-term debt
Interest expense, long-term debt	4,700,000	3,800,000	2,300,000
Restated credit agreement
Long-term debt
Aggregate amount of increase option	500,000,000
Outstanding letters of credit	3,700,000	4,400,000
Restated credit agreement | Base rate
Long-term debt
Variable rate basis	base rate
Restated credit agreement | Base rate | Minimum
Long-term debt
Applicable margin added to reference rate for variable interest (as a percent)	0.50%
Restated credit agreement | Base rate | Maximum
Long-term debt
Applicable margin added to reference rate for variable interest (as a percent)	1.00%
Restated credit agreement | Base rate | Federal funds rate
Long-term debt
Base rate basis	federal funds rate
Margin added to reference rate for base rate (as a percent)	0.50%
Restated credit agreement | Base rate | Prime rate
Long-term debt
Base rate basis	prime rate
Restated credit agreement | Base rate | Eurodollar rate for base rate
Long-term debt
Base rate basis	eurodollar rate
Margin added to reference rate for base rate (as a percent)	1.00%
Restated credit agreement | Eurodollar rate
Long-term debt
Variable rate basis	eurodollar rate
Restated credit agreement | Eurodollar rate | Minimum
Long-term debt
Applicable margin added to reference rate for variable interest (as a percent)	1.50%
Restated credit agreement | Eurodollar rate | Maximum
Long-term debt
Applicable margin added to reference rate for variable interest (as a percent)	2.00%
US revolving credit facility
Long-term debt
Credit facility	800,000,000
Alternative currency revolving credit facility
Long-term debt
Credit facility	200,000,000
Former term loan B and credit facility
Long-term debt
Loss on extinguishment of debt		$ (19,700,000)