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Effects of Revision on Condensed Consolidated Statement of Cash Flows (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings $ 792 $ 1,144 $ 3,935
Deferred income tax benefit (180) (113)  
Other non-cash items, net 132 102  
Change in Other current assets (60) (23)  
Change in Other current liabilities (1,095) (817)  
Net cash provided by operating activities 368 418  
Reported
      
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings   1,191  
Deferred income tax benefit   (166)  
Other non-cash items, net   97  
Change in Other current assets   (22)  
Change in Other current liabilities   (807)  
Net cash provided by operating activities   418  
Correction
      
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings   (47)  
Deferred income tax benefit   53  
Other non-cash items, net   5  
Change in Other current assets   (1)  
Change in Other current liabilities   (10)  
Net cash provided by operating activities   $ 0