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 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 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 $ (15)   $ (15) $ 2,452 $ (2)
Interest rate contracts | Investment income and other          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 0   0 0 0
Interest rate contracts | Interest expense          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income (3)   (3) (8) (9)
Interest rate contracts | Revenue          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 0   0 0 0
Foreign currency exchange contracts | Investment income and other          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 0   0 0 0
Foreign currency exchange contracts | Interest expense          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 0   0 0 0
Foreign currency exchange contracts | Revenue          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 22   38 44 173
Accumulated Net Unrealized Investment Gain (Loss) [Member]          
AmountsReclassifiedFromAOCI [Line Items]          
Reclassification to earnings, tax effect 0   0 0 (1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 0   1 4 3
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Income tax expense          
AmountsReclassifiedFromAOCI [Line Items]          
Reclassification to earnings, tax effect 0   0 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 0   1 4 3
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 0   1 4 4
Unrealized gain (loss) on cash flow hedges, net of tax:          
AmountsReclassifiedFromAOCI [Line Items]          
Reclassification to earnings, tax effect (5)   (8) (9) (39)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax 14   27 27 125
Unrealized gain (loss) on cash flow hedges, net of tax: | Income tax expense          
AmountsReclassifiedFromAOCI [Line Items]          
Reclassification to earnings, tax effect (5)   (8) (9) (39)
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 14   27 27 125
Unrealized gain (loss) on cash flow hedges, net of tax: | Interest rate contracts | Interest expense          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income (3)   (3) (8) (9)
Unrealized gain (loss) on cash flow hedges, net of tax: | Foreign currency exchange contracts | Revenue          
AmountsReclassifiedFromAOCI [Line Items]          
Amount of gain or (loss) reclassified from accumulated other comprehensive income 22   38 44 173
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 (29)   (43) (2,421) 130
Accumulated Defined Benefit Plans Adjustment [Member] | Income tax expense          
AmountsReclassifiedFromAOCI [Line Items]          
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 9   13 (763) 40
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 (29)   (43) 2,421 (130)
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 (38)   (56) (109) (170)
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 0   0 69 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Plan Amendments, Reclassification Adjustment from AOCI, before Tax $ 0   $ 0 $ (66) $ 0