Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 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)) 26 $ (304)
Current period changes in fair value (net of tax effect of $0, and $2) 3 2
Current period changes in fair value (net of tax effect of $(25) and $(32)) (162) 176
Balance at end of period (3,647) (3,688)
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)) 26 (304)
Balance at end of period (871) (761)
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) 3 2
Reclassification to earnings (net of tax effect of $(1) and $(4)) 0 0
Balance at end of period 2 2
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)) (100) 199
Reclassification to earnings (net of tax effect of $0 and $(6)) (62) (23)
Balance at end of period (95) 237
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) 26 26
Balance at end of period (2,683) (3,166)
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax $ 0 $ 6