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Goodwill And Purchased Intangible Assets (Estimated Future Amortization Expense) (Details) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Goodwill And Purchased Intangible Assets [Abstract] 
2011$ 13[1]
201251
201350
201448
201546
2016 and thereafter493
Total$ 701
[1] Represents the estimated amortization to be recognized for the remaining three months of 2011.