Quarterly report pursuant to Section 13 or 15(d)

Carrying Value of Outstanding Debt (Detail)

v2.4.0.8
Carrying Value of Outstanding Debt (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 11,720  
Long-term Debt and Capital Lease Obligations 11,923 12,870
Less current maturities (1,086) (1,781)
Long-Term Debt 10,837 11,089
4.50% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,750  
Debt instrument, stated interest rate 4.50%  
3.875% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,000  
Debt instrument, stated interest rate 3.875%  
Commercial Paper
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,045  
Maturity - Minimum Date Dec. 31, 2013  
Maturity - Maximum Date Dec. 31, 2013  
Total debt 1,045 0
Senior notes | 4.50% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 0  
Maturity - Maximum Date Jan. 15, 2013  
Debt instrument, stated interest rate 4.50%  
Total debt 0 1,751
Senior notes | 3.875% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,000  
Maturity - Maximum Date Apr. 15, 2014  
Debt instrument, stated interest rate 3.875%  
Total debt 1,020 1,033
Senior notes | 5.50% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 750  
Maturity - Maximum Date Jan. 15, 2018  
Debt instrument, stated interest rate 5.50%  
Total debt 823 851
Senior notes | 5.125% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,000  
Maturity - Maximum Date Apr. 15, 2019  
Debt instrument, stated interest rate 5.125%  
Total debt 1,090 1,140
Senior notes | Debentures 8 Point 375 Percent Due 2030 [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 276  
Total debt 283 284
Senior notes | 3.125% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,500  
Maturity - Maximum Date Jan. 15, 2021  
Debt instrument, stated interest rate 3.125%  
Total debt 1,606 1,655
Senior notes | 6.20% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,500  
Maturity - Maximum Date Jan. 15, 2038  
Debt instrument, stated interest rate 6.20%  
Total debt 1,481 1,480
Senior notes | 4.875% stated rate
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 500  
Maturity - Maximum Date Nov. 15, 2040  
Debt instrument, stated interest rate 4.875%  
Total debt 489 489
Senior notes | A1125SeniorNotes [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 375  
Maturity - Maximum Date Oct. 01, 2017  
Debt instrument, stated interest rate 1.125%  
Total debt 365 373
Senior notes | 2.45% senior notes [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,000  
Maturity - Maximum Date Oct. 01, 2022  
Debt instrument, stated interest rate 2.45%  
Total debt 934 996
Senior notes | 3.625% senior notes [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 375  
Maturity - Maximum Date Oct. 01, 2042  
Debt instrument, stated interest rate 3.625%  
Total debt 367 367
Senior notes | Debentures 8 Point 375 Percent Due 2020 [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 424  
Total debt 486 512
Senior notes | Floating rate senior notes
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 377  
Maturity - Minimum Date Jan. 01, 2049  
Maturity - Maximum Date Jan. 01, 2053  
Total debt 373 374
Debentures [Member] | 8.375% debentures due 2030 [Member]
   
Debt Instrument [Line Items]    
Maturity - Maximum Date Jan. 01, 2030  
Debt instrument, stated interest rate 8.375%  
Debentures [Member] | 8.375% debentures due 2020 [Member]
   
Debt Instrument [Line Items]    
Maturity - Minimum Date Jan. 01, 2020  
Debt instrument, stated interest rate 8.375%  
Facility notes and bonds
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 320  
Maturity - Minimum Date Jan. 01, 2015  
Maturity - Maximum Date Jan. 01, 2036  
Total debt 320 320
Pound Sterling notes
   
Debt Instrument [Line Items]    
Maturity - Minimum Date Jan. 01, 2031  
Maturity - Maximum Date Jan. 01, 2050  
Pound Sterling notes | Pound Sterling Notes 5 Point 5 Percent [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 101  
Total debt 97 103
Pound Sterling notes | Pound Sterling Notes 5 Point 13 Percent [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 693  
Total debt 660 699
Capital Lease Obligations
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 481  
Maturity - Minimum Date Dec. 31, 2013  
Maturity - Maximum Date Jan. 01, 3004  
Total debt 481 440
Other debt
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 3  
Maturity - Minimum Date Jan. 01, 2013  
Maturity - Maximum Date Jan. 01, 2022  
Total debt $ 3 $ 3