Quarterly report pursuant to Section 13 or 15(d)

Carrying Value of Outstanding Debt (Detail)

v2.4.0.6
Carrying Value of Outstanding Debt (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Debt Instrument [Line Items]    
Total debt $ 15,007 $ 11,128
Less current maturities (3,859) (33)
Long-Term Debt 11,148 11,095
4.50% stated rate
   
Debt Instrument [Line Items]    
Debt instrument, stated interest rate 4.50%  
A1125SeniorNotes [Member]
   
Debt Instrument [Line Items]    
Debt instrument, stated interest rate 1.125%  
2.45% senior notes [Member]
   
Debt Instrument [Line Items]    
Debt instrument, stated interest rate 2.45%  
3.625% senior notes [Member]
   
Debt Instrument [Line Items]    
Debt instrument, stated interest rate 3.625%  
Commercial Paper
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2012  
Maturity - Maximum Date 2012  
Total debt 2,075 0
Senior notes | 4.50% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2013  
Debt instrument, stated interest rate 4.50%  
Total debt 1,759 1,778
Senior notes | 3.875% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2014  
Debt instrument, stated interest rate 3.875%  
Total debt 1,040 1,050
Senior notes | 5.50% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2018  
Debt instrument, stated interest rate 5.50%  
Total debt 856 841
Senior notes | 5.125% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2019  
Debt instrument, stated interest rate 5.125%  
Total debt 1,147 1,119
Senior notes | 3.125% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2021  
Debt instrument, stated interest rate 3.125%  
Total debt 1,663 1,641
Senior notes | 6.20% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2038  
Debt instrument, stated interest rate 6.20%  
Total debt 1,480 1,480
Senior notes | 4.875% stated rate
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2040  
Debt instrument, stated interest rate 4.875%  
Total debt 489 489
Senior notes | A1125SeniorNotes [Member]
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2017  
Debt instrument, stated interest rate 1.125%  
Total debt 373 0
Senior notes | 2.45% senior notes [Member]
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2022  
Debt instrument, stated interest rate 2.45%  
Total debt 994 0
Senior notes | 3.625% senior notes [Member]
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2042  
Debt instrument, stated interest rate 3.625%  
Total debt 367 0
Senior notes | Floating rate senior notes
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2049  
Maturity - Maximum Date 2053  
Total debt 376 376
Debentures | 8.375% stated rate, 2020 maturity
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2020  
Debt instrument, stated interest rate 8.375%  
Total debt 515 504
Debentures | 8.375% stated rate, 2030 maturity
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2030  
Debt instrument, stated interest rate 8.375%  
Total debt 284 284
Facility notes and bonds
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2015  
Maturity - Maximum Date 2036  
Total debt 320 320
Pound Sterling notes
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2031  
Maturity - Maximum Date 2050  
Total debt 804 777
Capital Lease Obligations
   
Debt Instrument [Line Items]    
Maturity - Minimum Date 2012  
Maturity - Maximum Date 3004  
Total debt 462 469
Other debt
   
Debt Instrument [Line Items]    
Maturity - Maximum Date 2022  
Total debt $ 3 $ 0