Quarterly report pursuant to Section 13 or 15(d)

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

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SHAREOWNERS' EQUITY - Gains (Losses) Reclassified from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Other expenses $ (1,968) $ (1,998)
Investment income and other 118 169
Interest expense (195) (188)
Revenue 21,706 22,925
Income tax (expense) benefit (423) (627)
Net income 1,113 1,895
Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net income 0 26
Foreign currency translation gain (loss) | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Other expenses 0 (3)
Income tax (expense) benefit 0 0
Net income 0 (3)
Unrealized gain (loss) on marketable securities | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Investment income and other 0 (3)
Income tax (expense) benefit 0 1
Net income 0 (2)
Unrealized gain (loss) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense (1) (1)
Revenue 41 68
Income tax (expense) benefit (10) (16)
Net income 30 51
Unrecognized pension and postretirement benefit costs | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax (expense) benefit 8 7
Net income (30) (20)
Prior service costs | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Investment income and other $ (38) $ (27)