Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     $ (4,483)  
Translation adjustment (net tax effect of $(93) and $0) $ 24 $ (31) 54 $ (5)
Current period changes in fair value (net of tax effect of $0 and $4) 1 2 1 5
Current period changes in fair value (net of tax effect of $(109) and $(5)) (151) 43 (192) (119)
Balance at end of period (4,202) (3,606) (4,202) (3,606)
Foreign currency translation gain (loss):        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (1,016) (897)
Translation adjustment (net tax effect of $(93) and $0)     54 (5)
Balance at end of period (962) (902) (962) (902)
Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (1) (1)
Current period changes in fair value (net of tax effect of $0 and $4)     1 5
Balance at end of period 0 4 0 4
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax     0 0
Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (45) 67
Current period changes in fair value (net of tax effect of $(109) and $(5))     (181) (7)
Reclassification to earnings (net of tax effect of $(7) and $(67))     (11) (112)
Balance at end of period (237) (52) (237) (52)
Reclassification to earnings, tax effect     (7) (67)
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (3,421) (2,709)
Remeasurement of plan assets and liabilities (net of tax effect of $(214) and $0)     355 0
Reclassification to earnings (net of tax effect of $37 and $33)     63 53
Balance at end of period (3,003) (2,656) (3,003) (2,656)
Income Tax Expense Benefit [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Reclassification to earnings, tax effect 0 (29) (7) (67)
Income Tax Expense Benefit [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax 19 16 37 33
Net Income [Member] [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
TotalOtherComprehensiveIncomeReclassification, Net of Tax (31) 23 (52) 59
Net Income [Member] [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Reclassification to earnings (net of tax effect of $(7) and $(67)) 0 (50) (11) (112)
Net Income [Member] [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Reclassification to earnings (net of tax effect of $37 and $33) (31) (27) (63) (53)
Labor and Related Expense [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax (50) (43) (100) (86)
Foreign Exchange Contract [Member] | Revenue [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax 7 85 32 191
Interest Rate Contract [Member] | Interest Expense [Member] | Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax $ (7) $ (6) $ (14) $ (12)