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Other Financial Data (Accounts Receivable, Net) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 30, 2013
Dec. 31, 2012
Other Financial Data [Abstract]    
Accounts receivable $ 1,695 $ 1,932
Less allowance for doubtful accounts (51) (51)
Accounts receivable, net $ 1,644 $ 1,881