v3.26.3
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance $ 35,755 $ 37,484 $ 35,980 $ 45,081 $ 44,660 $ 44,858 $ 35,980 $ 44,858
Total other comprehensive income/(loss), net of tax (343) 108 (170) 369 915 481 (405) 1,765
Ending balance 36,960 35,755 37,484 47,417 45,081 44,660 36,960 47,417
Net gains on cash flow hedges             117  
AOCI                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (7,772) (7,880) (7,710) (8,242) (9,158) (9,639) (7,710) (9,639)
Total other comprehensive income/(loss), net of tax (343) 108 (170) 369 916 481    
Ending balance (8,115) (7,772) (7,880) (7,873) (8,242) (9,158) (8,115) (7,873)
Foreign currency translation                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (5,013)   (4,878) (5,105)   (6,899) (4,878) (6,899)
Other comprehensive income (loss), before reclassifications, before tax (60)     36     (247) 1,762
Other comprehensive income (loss) before reclassifications, tax 133     8     88 (64)
Other comprehensive income (loss), before reclassifications, net of tax (193)     28     (335) 1,826
Reclassification from accumulated other comprehensive income, net of tax 0     0     7 (4)
Total other comprehensive income/(loss), net of tax (193)     28     (328) 1,822
Ending balance (5,206) (5,013)   (5,077) (5,105)   (5,206) (5,077)
Marketable securities                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (27)   81 53   (50) 81 (50)
Other comprehensive income (loss), before reclassifications, before tax (143)     34     (273) 173
Other comprehensive income (loss) before reclassifications, tax (34)     8     (65) 40
Other comprehensive income (loss), before reclassifications, net of tax (109)     26     (208) 133
Reclassification from accumulated other comprehensive income, before tax (1)     (3)     (14) (8)
Reclassification from AOCI, tax 1     (1)     (3) (2)
Reclassification from accumulated other comprehensive income, net of tax (2)     (2)     (11) (6)
Total other comprehensive income/(loss), net of tax (111)     24     (219) 127
Ending balance (138) (27)   77 53   (138) 77
Derivative instruments                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance 94   (38) (262)   277 (38) 277
Other comprehensive income (loss), before reclassifications, before tax (39)     361     219 (236)
Other comprehensive income (loss) before reclassifications, tax (10)     88     52 (51)
Other comprehensive income (loss), before reclassifications, net of tax (29)     273     167 (185)
Reclassification from accumulated other comprehensive income, before tax (42)     23     (126) (82)
Reclassification from AOCI, tax (10)     5     (30) (19)
Reclassification from accumulated other comprehensive income, net of tax (32)     18     (96) (63)
Total other comprehensive income/(loss), net of tax (61)     291     71 (248)
Ending balance 33 94   29 (262)   33 29
Pension and other postretirement benefits                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Beginning balance (2,826)   $ (2,875) (2,928)   $ (2,967) (2,875) (2,967)
Total other comprehensive income/(loss), net of tax 22     26     71 65
Ending balance (2,804) $ (2,826)   (2,902) $ (2,928)   (2,804) (2,902)
Net prior service costs/(credits) reclassified from AOCI to net income                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Other comprehensive income (loss), before reclassifications, before tax 30     32     91 92
Other comprehensive income (loss) before reclassifications, tax 7     7     23 22
Other comprehensive income (loss), before reclassifications, net of tax 23     25     68 70
Translation effect on non-U.S. plans                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Total other comprehensive income/(loss), net of tax $ (1)     $ 1     $ 3 (5)
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest                
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]                
Total other comprehensive income/(loss), net of tax               $ (1)