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Effects of Revision on Condensed Consolidated Statement of Cash Flows (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings $ 150 $ 542 $ 3,935
Deferred income tax benefit (98) (67)  
Other non-cash expense, net 48 45  
Change in other current assets (59) (86)  
Change in other current liabilities (815) (371)  
Net cash used in operating activities (577) (385)  
Reported
      
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings   574  
Deferred income tax benefit   (104)  
Other non-cash expense, net   44  
Change in other current assets   (85)  
Change in other current liabilities   (366)  
Net cash used in operating activities   (385)  
Correction
      
Error Corrections and Prior Period Adjustments Revision [Line Items]      
Net earnings   (32)  
Deferred income tax benefit   37  
Other non-cash expense, net   1  
Change in other current assets   (1)  
Change in other current liabilities   $ (5)