Quarterly report pursuant to Section 13 or 15(d)

Activity in Accumulated Other Comprehensive Income (Loss) (Phantoms) (Detail)

v3.5.0.2
Activity in Accumulated Other Comprehensive Income (Loss) (Phantoms) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (3,606) $ (3,727) $ (3,606) $ (3,727) $ (3,540)  
Change in foreign currency translation adjustment, net of tax (31) 101 (5) (203)    
Foreign currency translation gain (loss):            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax (902) (660) (902) (660) (897) $ (457)
Change in foreign currency translation adjustment, net of tax     (5) (203)    
Aggregate adjustment for the period, tax     0 0    
Unrealized gain (loss) on marketable securities, net of tax:            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax 4 1 4 1 (1) 0
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax     0 0    
Current period changes in fair value, tax effect     4 0    
Reclassification to earnings, tax effect     0 0    
Unrealized gain (loss) on cash flow hedges, net of tax:            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax (52) 78 (52) 78 67 61
Current period changes in fair value, tax effect     (5) 56    
Reclassification to earnings, tax effect     (67) (45)    
Accumulated Defined Benefit Plans Adjustment [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (2,656) $ (3,146) (2,656) (3,146) $ (2,709) $ (3,198)
Reclassification to earnings, tax effect     33 35    
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Tax     $ 0 $ 0