Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period $ (4,994)  
Translation adjustment (net of tax effect of $9 and $(9)) 53 $ (6)
Current period changes in fair value (net of tax effect of $0 and $(1)) 4 (3)
Current period changes in fair value (net of tax effect of $28 and $(33)) 76 (66)
Balance at end of period (4,818) (5,638)
Foreign currency translation gain (loss):    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (1,126) (930)
Translation adjustment (net of tax effect of $9 and $(9)) 53 (6)
Balance at end of period (1,073) (983)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax 0 (47)
Unrealized gain (loss) on marketable securities, net of tax:    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (2) (2)
Current period changes in fair value (net of tax effect of $0 and $(1)) 4 (4)
Balance at end of period 2 (5)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 0 1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 0 (1)
Unrealized gain (loss) on cash flow hedges, net of tax:    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period 40 (366)
Current period changes in fair value (net of tax effect of $28 and $(33)) 89 (102)
Reclassification to earnings (net of tax effect of $(4) and $12) (13) 36
Balance at end of period 116 (511)
Reclassification to earnings, tax effect (13) 36
Accumulated Defined Benefit Plans Adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (3,906) (3,569)
Remeasurement of plan assets and liabilities (net of tax effect of $0 and $214) (1) 43 39
Reclassification to earnings (net of tax effect of $_ and $12) 0 (609)
Balance at end of period (3,863) (4,139)
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
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 (4) 12
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 13 12
Net Income [Member] [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TotalOtherComprehensiveIncomeReclassification, Net of Tax (30) (76)
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 0 (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 $(4) and $12) (13) 36
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 $_ and $12) (43) (39)
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 (56) (51)
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 23 (42)
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)