Annual report pursuant to Section 13 and 15(d)

Debt And Other Obligations (Schedule Of Information Relating To Interest Rates And Expense) (Details)

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Debt And Other Obligations (Schedule Of Information Relating To Interest Rates And Expense) (Details) (6.00% Convertible Senior Notes Due 2015 [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 25, 2010
Dec. 26, 2009
6.00% Convertible Senior Notes Due 2015 [Member]
     
Debt And Other Obligations [Line Items]      
Effective interest rate 8.00% 8.00% 8.00%
Interest cost related to contractual interest coupon $ 45 $ 93 $ 117
Interest cost related to amortization of the discount $ 11 $ 20 $ 25