Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Balance at beginning of period     $ (4,994)      
Translation adjustment (net of tax effect of $41 and $1) $ (48) $ (28) (28) $ (112)    
Current period changes in fair value (net of tax effect of $1 and $(1)) (3) (1) 6 (4)    
Current period changes in fair value (net of tax effect of $79 and $14) 206 49 270 315    
Balance at end of period (4,617) (5,288) (4,617) (5,288)    
Foreign currency translation gain (loss):            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Balance at beginning of period (1,106) (1,061) (1,126) (930)    
Translation adjustment (net of tax effect of $41 and $1) (48) (28) (28) (112)    
Balance at end of period (1,154) (1,089) (1,154) (1,089)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax     0 (47)    
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Balance at beginning of period 7 (5) (2) (2)    
Current period changes in fair value (net of tax effect of $1 and $(1)) 2 (2) 11 (6)    
Balance at end of period 4 (6) 4 (6)    
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 1 0 1 1    
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 5 (1) (5) 2    
Unrealized gain (loss) on cash flow hedges, net of tax:            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Balance at beginning of period 104 (179) 40 (366)    
Current period changes in fair value (net of tax effect of $79 and $14) 251 44 355 254    
Reclassification from AOCI pursuant to the early adoption of ASU 2018-02         $ 0 $ (79)
Reclassification to earnings (net of tax effect of $(14) and $1) 45 (5) (85) 61    
Balance at end of period 310 (130) 310 (130)    
Reclassification to earnings, tax effect (14) 1 27 19    
Accumulated Defined Benefit Plans Adjustment [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Balance at beginning of period (3,820) (4,101) (3,906) (3,569)    
Remeasurement of plan assets and liabilities (net of tax effect of $0 and $214) (1) 43 38 129 115    
Balance at end of period (3,777) (4,063) (3,777) (4,063)    
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax     0 (609)    
Income Tax Expense Benefit [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax (1) 0 (1) 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 (14) 1 (27) 19    
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 14 12 41 36    
Net Income [Member] [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
TotalOtherComprehensiveIncomeReclassification, Net of Tax 7 (44) (39) (178)    
Net Income [Member] [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax (5) 1 (5) 2    
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 $(14) and $1) (45) 5 (85) 61    
Net Income [Member] [Member] | Accumulated Defined Benefit Plans Adjustment [Member]            
Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax (43) (38) (129) (115)    
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 (57) (50) (170) (151)    
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 62 0 124 (62)    
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 $ (3) $ (6) $ (12) $ (18)