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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 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)) $ (7) $ (141) (12) $ (344)
Current period changes in fair value (net of tax effect of $0, and $2) (1) 0 4 1
Current period changes in fair value (net of tax effect of $(25) and $(32)) (64) (11) (183) 6
Balance at end of period (3,651) (3,851) (3,651) (3,851)
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))     (12) (344)
Balance at end of period (909) (801) (909) (801)
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)     4 1
Reclassification to earnings (net of tax effect of $(1) and $(4))     0 0
Balance at end of period 3 1 3 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))     (24) 119
Reclassification to earnings (net of tax effect of $0 and $(6))     (159) (113)
Balance at end of period (116) 67 (116) 67
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)     80 80
Balance at end of period $ (2,629) $ (3,118) $ (2,629) $ (3,118)