Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     $ (3,540)  
Aggregate adjustment for the period (net of tax effect of $0 and $(9)) $ (31) $ 101 (5) $ (203)
Current period changes in fair value (net of tax effect of $0, and $2) 2 (1) 5 1
Current period changes in fair value (net of tax effect of $(25) and $(32)) 43 (159) (119) 17
Balance at end of period (3,606) (3,727) (3,606) (3,727)
Foreign currency translation gain (loss):        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (897) (457)
Aggregate adjustment for the period (net of tax effect of $0 and $(9))     (5) (203)
Balance at end of period (902) (660) (902) (660)
Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (1) 0
Current period changes in fair value (net of tax effect of $0, and $2)     5 1
Reclassification to earnings (net of tax effect of $(1) and $(4))     0 0
Balance at end of period 4 1 4 1
Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     67 61
Current period changes in fair value (net of tax effect of $(25) and $(32))     (7) 91
Reclassification to earnings (net of tax effect of $0 and $(6))     (112) (74)
Balance at end of period (52) 78 (52) 78
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (2,709) (3,198)
Reclassification to earnings (net of tax effect of $16 and $28)     53 52
Balance at end of period $ (2,656) $ (3,146) $ (2,656) $ (3,146)