Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 24, 2021		Sep. 25, 2020	Sep. 27, 2019
Summary Of Significant Accounting Policies [Line Items]
Maximum credit exposure (percent)		5.00%
Advertising expense		$ 52,253		$ 61,125	$ 49,118
Transaction and re-measurement gains/losses		(749)		(1,361)	$ (260)
Operating lease right-of-use assets		67,128		76,515
Operating lease liabilities		72,118
Realized gains/(losses)	[1]	9,243		4,045
Cash Flow Hedges
Summary Of Significant Accounting Policies [Line Items]
Realized gains/(losses)		$ 9,032	[1]	$ (894)
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets with definite lives, useful life, minimum years		3 years
Minimum [Member] | Internal Use Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets with definite lives, useful life, minimum years		3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets with definite lives, useful life, minimum years		18 years
Maximum [Member] | Internal Use Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets with definite lives, useful life, minimum years		5 years
Foreign Exchange Forward [Member]
Summary Of Significant Accounting Policies [Line Items]
Derivative, Remaining Maturity		38 days		31 days
Notional amount of derivative		$ 35,300		$ 26,800

[1] Realized gains or losses, if any, from the sale of our AFS investment securities or from foreign currency translation adjustments are included within other income/expense, net in our consolidated statements of operations