Income Taxes (Aggregate Changes In Balance Of Gross Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits if recognized, would affect our effective tax rate	$ 53,000
Estimated decrease in unrecognized tax benefits due to lapse in statute of limitations	1,000
Unrecognized Tax Benefits, Expected Reduction as a Result of Settlement		$ 8,400
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	31,351	32,468	$ 16,880
Increases in balances related to tax positions taken during prior years	507	333	9,082
Increases in balances related to tax positions taken during the current year	34,293	2,916	10,422
Lapse of statute of limitations	(990)	(4,366)	(3,064)
Settlements	0	0	(852)
Unrecognized Tax Benefits, Ending Balance	$ 65,161	$ 31,351	$ 32,468