Summary Of Significant Accounting Policies (Schedule Of Reconciliation Of Basic And Diluted Share Amounts) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended																12 Months Ended
	Sep. 24, 2011		Jun. 25, 2011		Mar. 26, 2011		Dec. 25, 2010		Sep. 25, 2010		Jun. 26, 2010		Mar. 27, 2010		Dec. 26, 2009		Sep. 24, 2011	Sep. 25, 2010	Sep. 26, 2009
Summary Of Significant Accounting Policies [Line Items]
Net income (loss)	$ 27,569	[1]	$ 36,196	[1]	$ 82,445	[1]	$ 10,940	[1]	$ (136,974)	[2]	$ 27,448	[2]	$ 20,618	[2]	$ 26,095	[2]	$ 157,150	$ (62,813)	$ (2,216,642)
Basic weighted average common shares outstanding																	261,099	258,743	256,545
Weighted average common stock equivalents from assumed exercise of stock options and restricted stock units																	3,206
Diluted weighted average common shares outstanding																	264,305	258,743	256,545
Basic net income (loss) per common share																	$ 0.60	$ (0.24)	$ (8.64)
Diluted net income (loss) per common share	$ 0.10		$ 0.14		$ 0.31		$ 0.04		$ (0.53)	[3]	$ 0.10	[3]	$ 0.08	[3]	$ 0.10	[3]	$ 0.59	$ (0.24)	$ (8.64)
Outstanding Stock Options [Member]
Summary Of Significant Accounting Policies [Line Items]
Weighted-average anti-dilutive shares																	7,747	13,260	13,489
Restricted Stock [Member]
Summary Of Significant Accounting Policies [Line Items]
Weighted-average anti-dilutive shares																		1,427	1,575

[1] Net income in the first quarter of fiscal 2011 includes a loss on extinguishment of debt of $29.9 million and the second quarter of fiscal 2011 includes a gain on the sale of intellectual property of $84.5 million. See Notes 5 and 4 for further discussion.

[2] See Note 2 for further discussion of intangible asset and goodwill impairment charges recorded in the fourth quarter of fiscal 2010.

[3] The sum of the quarterly diluted net income (loss) per common share amounts do not sum to the year to date amounts reported in the Consolidated Statements of Operations due to rounding.