Employee Benefit Plans (Summary Of Activity In Stock Option Plans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Employee Benefit Plans [Abstract]
Outstanding at beginning of year, Shares	20,021,044	24,202,715	14,479,141
Outstanding at beginning of year, Weighted Average Exercise Price	$ 7.49	$ 11.81	$ 22.78
Granted, Shares	3,680,850	5,140,900	11,901,752
Granted, Weighted Average Exercise Price	$ 4.53	$ 8.11	$ 0.93
Granted - option exchange, Shares		1,350,709
Granted - option exchange, Weighted Average Exercise Price		$ 5.13
Canceled, Shares	(3,567,513)	(4,510,682)	(2,178,178)
Canceled, Weighted Average Exercise Price	$ 9.46	$ 21.57	$ 15.99
Cancelled - option exchange, Shares		(3,739,557)
Cancelled - option exchange, Weighted Average Exercise Price		$ 22.85
Exercised, Shares	(1,075,205)	(2,423,041)
Exercised, Weighted Average Exercise Price	$ 0.86	$ 0.95
Outstanding at end of year, Shares	19,059,176	20,021,044	24,202,715
Outstanding at end of year, Weighted Average Exercise Price	$ 6.90	$ 7.49	$ 11.81