v2.4.0.6
Components of Provision for Income Taxes, Net (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current taxes:                      
U.S. and state                 $ 562 $ 103 $ 311
International                 131 52 37
Current taxes                 693 155 348
Deferred taxes:                      
U.S. and state                 (156) 157 1
International                 (109) (21) 3
Deferred taxes                 (265) 136 4
Provision for income taxes, net $ 86 [1] $ 67 [1] $ 49 [1] $ 89 [1] $ 194 [1] $ 83 [1] $ 109 [1] $ 43 [1] $ 428 $ 291 $ 352
[1] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted-average shares outstanding for each period.