Employee Stock Plans (Weighted Average Assumptions For Employee Stock Plans And Employee Stock Purchase Plan) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010		Oct. 02, 2009
Employee Stock Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Expected term (in years)	4.75	4.72		4.57
Risk-free interest rate	2.00%	2.00%		1.80%
Expected volatility	35.50%	37.30%		39.20%
Expected dividend yield	0.00%	0.00%		0.00%
Weighted average fair value at grant date	$ 23.26	$ 18.17		$ 13.00
Employee Stock Purchase Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Expected term (in years)	0.50	0.00	[1]	0.50
Risk-free interest rate	0.10%	0.00%	[1]	0.30%
Expected volatility	14.00%	0.00%	[1]	41.90%
Expected dividend yield	0.00%	0.00%	[1]	0.00%
Weighted average fair value at grant date	$ 12.61	$ 0.00	[1]	$ 8.97

[1] No purchases were made under an employee stock purchase plan in fiscal year 2010.