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
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 11,935  
Long-term Debt and Capital Lease Obligations 12,082 10,872
Less current maturities (2,222) (48)
Long-Term Debt 9,860 10,824
Commercial Paper
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 1,183  
Maturity - Minimum Date Dec. 31, 2014  
Maturity - Maximum Date Dec. 31, 2014  
Total debt 1,183 0
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 1,000 1,007
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 817 821
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 1,079 1,079
Senior notes | Debentures 8 Point 375 Percent Due 2030 [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 276  
Total debt 283 283
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 1,593 1,579
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 1,481
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 368 367
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 934 913
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 480 479
Senior notes | Floating rate senior notes
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 374  
Maturity - Minimum Date Jan. 01, 2049  
Maturity - Maximum Date Jan. 01, 2053  
Total debt 370 370
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 111  
Total debt 107 105
Pound Sterling notes | Pound Sterling Notes 5 Point 13 Percent [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 757  
Total debt 721 714
Capital Lease Obligations
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 473  
Maturity - Minimum Date Dec. 31, 2013  
Maturity - Maximum Date Jan. 01, 3004  
Total debt 473 473
Other debt
   
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 17  
Maturity - Minimum Date Jan. 01, 2013  
Maturity - Maximum Date Jan. 01, 2022  
Total debt $ 17 $ 25