Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period $ (7,113)  
Translation adjustment (net of tax effect of $30 and $13) (82) $ (141)
Current period changes in fair value (net of tax effect of $0 and $0) (4) 2
Current period changes in fair value (net of tax effect of $39 and $83) 114 217
Balance at end of period (4,659) (5,876)
Foreign currency translation gain (loss):    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (981) (1,078)
Translation adjustment (net of tax effect of $30 and $13) (82) (141)
Balance at end of period (1,063) (1,219)
Aggregate adjustment for the period, tax 30 13
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period 6 4
Current period changes in fair value (net of tax effect of $0 and $0) (1) 2
Reclassification to earnings (net of tax effect of $0 and $0) (3) 0
Balance at end of period 2 6
Current period changes in fair value, tax effect 0 0
Reclassification to earnings, tax effect 0 0
Unrealized gain (loss) on cash flow hedges, net of tax:    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (223) 112
Current period changes in fair value (net of tax effect of $39 and $83) 124 263
Reclassification to earnings (net of tax effect of $(3) and $(15)) (10) (46)
Balance at end of period (109) 329
Current period changes in fair value, tax effect 39 83
Reclassification to earnings, tax effect (3) (15)
Accumulated Defined Benefit Plans Adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Balance at beginning of period (5,915) (5,035)
Balance at end of period (3,489) (4,992)
Reclassification to earnings, tax effect (780) 14
Income Tax Expense Benefit [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Reclassification to earnings, tax effect 0 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 (3) (15)
Net Income [Member] [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Reclassification to earnings (net of tax effect of $0 and $0) (3) 0
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 $(3) and $(15)) $ (10) $ (46)