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
9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Jan. 15, 2013
4.50% stated rate
Sep. 30, 2013
3.875% stated rate
Sep. 30, 2013
Commercial Paper
Dec. 31, 2012
Commercial Paper
Sep. 30, 2013
Senior notes
4.50% stated rate
Dec. 31, 2012
Senior notes
4.50% stated rate
Sep. 30, 2013
Senior notes
3.875% stated rate
Dec. 31, 2012
Senior notes
3.875% stated rate
Sep. 30, 2013
Senior notes
5.50% stated rate
Dec. 31, 2012
Senior notes
5.50% stated rate
Sep. 30, 2013
Senior notes
5.125% stated rate
Dec. 31, 2012
Senior notes
5.125% stated rate
Sep. 30, 2013
Senior notes
Debentures 8 Point 375 Percent Due 2030 [Member]
Dec. 31, 2012
Senior notes
Debentures 8 Point 375 Percent Due 2030 [Member]
Sep. 30, 2013
Senior notes
3.125% stated rate
Dec. 31, 2012
Senior notes
3.125% stated rate
Sep. 30, 2013
Senior notes
6.20% stated rate
Dec. 31, 2012
Senior notes
6.20% stated rate
Sep. 30, 2013
Senior notes
4.875% stated rate
Dec. 31, 2012
Senior notes
4.875% stated rate
Sep. 30, 2013
Senior notes
A1125SeniorNotes [Member]
Dec. 31, 2012
Senior notes
A1125SeniorNotes [Member]
Sep. 30, 2013
Senior notes
2.45% senior notes [Member]
Dec. 31, 2012
Senior notes
2.45% senior notes [Member]
Sep. 30, 2013
Senior notes
3.625% senior notes [Member]
Dec. 31, 2012
Senior notes
3.625% senior notes [Member]
Sep. 30, 2013
Senior notes
Debentures 8 Point 375 Percent Due 2020 [Member]
Dec. 31, 2012
Senior notes
Debentures 8 Point 375 Percent Due 2020 [Member]
Sep. 30, 2013
Senior notes
Floating rate senior notes
Dec. 31, 2012
Senior notes
Floating rate senior notes
Sep. 30, 2013
Debentures [Member]
8.375% debentures due 2030 [Member]
Sep. 30, 2013
Debentures [Member]
8.375% debentures due 2020 [Member]
Sep. 30, 2013
Facility notes and bonds
Dec. 31, 2012
Facility notes and bonds
Sep. 30, 2013
Pound Sterling notes
Sep. 30, 2013
Pound Sterling notes
Pound Sterling Notes 5 Point 5 Percent [Member]
Dec. 31, 2012
Pound Sterling notes
Pound Sterling Notes 5 Point 5 Percent [Member]
Sep. 30, 2013
Pound Sterling notes
Pound Sterling Notes 5 Point 13 Percent [Member]
Dec. 31, 2012
Pound Sterling notes
Pound Sterling Notes 5 Point 13 Percent [Member]
Sep. 30, 2013
Capital Lease Obligations
Dec. 31, 2012
Capital Lease Obligations
Sep. 30, 2013
Other debt
Dec. 31, 2012
Other debt
Debt Instrument [Line Items]                                                                                          
Debt Instrument, Face Amount $ 12,395   $ 1,750 $ 1,000 $ 1,652   $ 0   $ 1,000   $ 750   $ 1,000   $ 276   $ 1,500   $ 1,500   $ 500   $ 375   $ 1,000   $ 375   $ 424   $ 377       $ 320     $ 107   $ 731   $ 488   $ 20  
Long-term Debt and Capital Lease Obligations 12,600 12,870                                                                                      
Maturity - Minimum Date         Dec. 31, 2013                                                   Jan. 01, 2049     Jan. 01, 2020 Jan. 01, 2015   Jan. 01, 2031         Dec. 31, 2013   Jan. 01, 2013  
Maturity - Maximum Date         Dec. 31, 2013   Jan. 15, 2013   Apr. 15, 2014   Jan. 15, 2018   Apr. 15, 2019       Jan. 15, 2021   Jan. 15, 2038   Nov. 15, 2040   Oct. 01, 2017   Oct. 01, 2022   Oct. 01, 2042       Jan. 01, 2053   Jan. 01, 2030   Jan. 01, 2036   Jan. 01, 2050         Jan. 01, 3004   Jan. 01, 2022  
Debt instrument, stated interest rate     4.50% 3.875%     4.50%   3.875%   5.50%   5.125%       3.125%   6.20%   4.875%   1.125%   2.45%   3.625%           8.375% 8.375%                      
Total debt         1,652 0 0 1,751 1,014 1,033 824 851 1,093 1,140 283 284 1,605 1,655 1,481 1,480 489 489 368 373 934 996 367 367 487 512 373 374     320 320   103 103 699 699 488 440 20 3
Less current maturities (1,703) (1,781)                                                                                      
Long-Term Debt $ 10,897 $ 11,089