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Long-term Customer Financing And Sales Of Receivables (Proceeds Received From Non-Recourse Sales Of Accounts Receivable And Long-Term Receivables) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Long-Term Customer Financing And Sales Of Receivables [Abstract]    
Accounts receivable sales proceeds $ 1 $ 5
Long-term receivable sales proceeds 28 67
Total proceeds from one-time sales of accounts receivable $ 29 $ 72