Quarterly report pursuant to Section 13 or 15(d)

SHAREOWNERS' EQUITY - Gains (Losses) Reclassified from AOCI (Detail)

v3.21.2
SHAREOWNERS' EQUITY - Gains (Losses) Reclassified from AOCI (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Defined Benefit Plan, Plan Amendments, Reclassification Adjustment from AOCI, before Tax $ 66      
Net income        
AmountsReclassifiedFromAOCI [Line Items]        
TotalOtherComprehensiveIncomeReclassification, Net of Tax (21) $ 10 $ 2,467 $ 13
Accumulated Net Unrealized Investment Gain (Loss) [Member]        
AmountsReclassifiedFromAOCI [Line Items]        
Reclassification to earnings, tax effect 0 (1) 0 (1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 1 2 4 2
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Income tax expense        
AmountsReclassifiedFromAOCI [Line Items]        
Reclassification to earnings, tax effect 0 (1) 0 (1)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Net income        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 1 2 4 2
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Investment income and other        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax 1 3 4 3
Unrealized gain (loss) on cash flow hedges, net of tax:        
AmountsReclassifiedFromAOCI [Line Items]        
Reclassification to earnings, tax effect (1) (16) (4) (31)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax 3 52 13 98
Unrealized gain (loss) on cash flow hedges, net of tax: | Income tax expense        
AmountsReclassifiedFromAOCI [Line Items]        
Reclassification to earnings, tax effect (1) (16) (4) (31)
Unrealized gain (loss) on cash flow hedges, net of tax: | Net income        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax 3 52 13 98
Unrealized gain (loss) on cash flow hedges, net of tax: | Interest rate contracts | Interest expense        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax (3) (3) (5) (6)
Unrealized gain (loss) on cash flow hedges, net of tax: | Foreign currency exchange contracts | Revenue        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax 7 71 22 135
Accumulated Defined Benefit Plans Adjustment [Member]        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax (25) (44)    
Accumulated Defined Benefit Plans Adjustment [Member] | Income tax expense        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 8 13 (772) 27
Accumulated Defined Benefit Plans Adjustment [Member] | Net income        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax (25) (44) 2,450 (87)
Accumulated Defined Benefit Plans Adjustment [Member] | Investment income and other        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax (36) (57) (71) (114)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax     3,290 0
Accumulated Defined Benefit Plans Adjustment [Member] | Other expenses        
AmountsReclassifiedFromAOCI [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax 69 0 69 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Plan Amendments, Reclassification Adjustment from AOCI, before Tax $ (66) $ 0 $ (66) $ 0