Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Detail)

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Borrowings (Detail) (USD $)
9 Months Ended
Oct. 01, 2011
Dec. 25, 2010
Debt Instrument [Line Items]    
Board Of Directors Maximum Borrowing Capacity Authorization $ 3,000,000,000  
Maximum Borrowings Commercial Paper Program 1,400,000,000  
2005 Junior Subordinated Convertible Debentures Due 2035 At 2.95% [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Dec. 15, 2035  
Debt Instrument, Face Amount 1,600,000,000  
Principal Amount Per Debenture Used In Conversion Rate 1,000  
Conversion rate (shares of common stock per $1,000 principal amount of debentures) 32.94 32.52
Effective conversion price (per share of common stock) $ 30.36 $ 30.75
Conversion Rate Adjustments, Quarterly Dividend Distributions Excess Per Share $ 0.10  
2009 Junior Subordinated Convertible Debentures Due 2039 At 3.25% [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Aug. 01, 2039  
Debt Instrument, Face Amount 2,000,000,000  
Principal Amount Per Debenture Used In Conversion Rate 1,000  
Conversion rate (shares of common stock per $1,000 principal amount of debentures) 44.55 44.09
Effective conversion price (per share of common stock) $ 22.45 $ 22.68
Conversion Rate Adjustments, Quarterly Dividend Distributions Excess Per Share $ 0.14  
2011 Senior Notes [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 5,000,000,000  
Net debt carrying amount 4,982,000,000  
2011 Senior Notes Due October 1, 2016 At 1.95% [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Oct. 01, 2016  
Net debt carrying amount 1,498,000,000  
Coupon interest rate 1.95%  
2011 Senior Notes Due October 1, 2021 At 3.30% [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Oct. 01, 2021  
Net debt carrying amount 1,995,000,000  
Coupon interest rate 3.30%  
2011 Senior Notes Due October 1, 2041 At 4.80% [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date Oct. 01, 2041  
Net debt carrying amount $ 1,489,000,000  
Coupon interest rate 4.80%