Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Change in Accounting Principle (Details)

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Summary of Significant Accounting Policies Change in Accounting Principle (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Sep. 28, 2012
Sep. 30, 2011
Dec. 31, 2011
Jul. 27, 2012
Jun. 29, 2012
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Common Stock - Shares Authorized 11,200,000,000   11,200,000,000   11,200,000,000 11,200,000,000 5,600,000,000
Stock split conversion ratio 2            
Cumulative effect adjustment on retained earnings from change in accounting methodology as of January 1, 2011         $ 59    
Impact on income before income taxes from a change in accounting methodology $ 1 $ 4 $ 3 $ 14