Annual report pursuant to Section 13 and 15(d)

SHAREOWNERS' EQUITY SHAREOWNERS' EQUITY - Reclassification from AOCI (Details)

v3.22.0.1
SHAREOWNERS' EQUITY SHAREOWNERS' EQUITY - Reclassification from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Defined Benefit Plan, Plan Amendments, Reclassification Adjustment from AOCI, before Tax $ 66      
Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings, tax effect   $ 0 $ (1) $ (1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax   5 4 5
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings, net of tax effect   (17) (45) (39)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax   55 143 123
Accumulated Defined Benefit Plans Adjustment [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings (net of tax effect of $67, $1,876 and $378)   2,378 (5,104) (1,988)
Investment Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax   5 5 6
Net Income [Member] [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
TotalOtherComprehensiveIncomeReclassification, Net of Tax   2,438 (4,957) (1,860)
Net Income [Member] [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax   5 4 5
Net Income [Member] [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax   55 143 123
Net Income [Member] [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings (net of tax effect of $67, $1,876 and $378)   2,378 (5,104) (1,988)
Tax | Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings, tax effect   0 (1) (1)
Tax | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Reclassification to earnings, net of tax effect   (17) (45) (39)
Tax | Accumulated Defined Benefit Plans Adjustment [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax   (749) 1,607 626
Investment income and other | Accumulated Defined Benefit Plans Adjustment [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax   (148) (227) (227)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax   3,272 (6,484) (2,387)
Other Expense | Accumulated Defined Benefit Plans Adjustment [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax   69 0 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Plan Amendments, Reclassification Adjustment from AOCI, before Tax   (66) 0 0
Interest rate contracts | Investment Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   0 0  
Interest rate contracts | Interest Expense [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   (11) (8)  
Interest rate contracts | Interest Expense [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   (11) (8) (15)
Foreign currency exchange contracts | Investment Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   0 0  
Foreign currency exchange contracts | Interest Expense [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   0 0  
Foreign currency exchange contracts | Revenue [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax   $ 83 $ 196 $ 177