Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     $ (4,867)  
Translation adjustment (net of tax effect of $(9) and $(14)) $ (28) $ 32 (112) $ 86
Current period changes in fair value (net of tax effect of $(1) and $0) (1) 0 (4) 1
Current period changes in fair value (net of tax effect of $(33) and $(17)) 49 (86) 315 (278)
Balance at end of period (5,288) (4,224) (5,288) (4,224)
Foreign currency translation gain (loss):        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (930) (1,016)
Translation adjustment (net of tax effect of $(9) and $(14))     (112) 86
Balance at end of period (1,089) (930) (1,089) (930)
Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (2) (1)
Current period changes in fair value (net of tax effect of $(1) and $0)     (6) 2
Balance at end of period (6) 0 (6) 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax     1 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax     (2) 1
Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (366) (45)
Current period changes in fair value (net of tax effect of $(33) and $(17))     254 (269)
Reclassification to earnings (net of tax effect of $12 and $(7))     61 (9)
Balance at end of period (130) (323) (130) (323)
Reclassification to earnings, tax effect     19 (6)
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (3,569) (3,421)
Remeasurement of plan assets and liabilities (net of tax effect of $0 and $214) (1)     0 356
Reclassification to earnings (net of tax effect of $12 and $18)     115 94
Balance at end of period (4,063) (2,971) (4,063) (2,971)
Income Tax Expense Benefit [Member] | Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 0   1 0
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 1 1 19 (6)
Income Tax Expense Benefit [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 12 19 36 56
Net Income [Member] [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
TotalOtherComprehensiveIncomeReclassification, Net of Tax (44) (32) (178) (84)
Net Income [Member] [Member] | Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax (1)   (2) 1
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 $12 and $(7)) 5 2 61 (9)
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 $12 and $18) (38) (31) (115) (94)
Labor and Related Expense [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax (50) (50) (151) (150)
Foreign exchange contracts | Interest Expense | 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 0 3 (62) 35
Interest rate contracts | Interest Expense | 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 $ (6) $ (6) $ (18) $ (20)