v3.26.1
RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
U.S. plans | Pension plans        
Service-related expense        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost on benefit obligation 112 119 221 237
Expected return on assets (147) (151) (291) (301)
Amortization of unrecognized:        
Prior service cost (benefit) 1 1 1 1
Net actuarial loss (gain) 56 50 108 98
Curtailment loss (gain) 0 0 0 0
Total net expense (benefit) 22 19 39 35
U.S. plans | Postretirement benefit plans        
Service-related expense        
Service cost 0 0 0 0
Interest cost on benefit obligation 3 3 6 7
Expected return on assets (3) (2) (5) (5)
Amortization of unrecognized:        
Prior service cost (benefit) (1) (3) (4) (5)
Net actuarial loss (gain) (3) (3) (5) (6)
Curtailment loss (gain) 0 0 0 0
Total net expense (benefit) (4) (5) (8) (9)
Non-U.S. plans | Pension plans        
Service-related expense        
Service cost 31 28 63 54
Interest cost on benefit obligation 106 106 221 206
Expected return on assets (113) (94) (224) (182)
Amortization of unrecognized:        
Prior service cost (benefit) 2 (1) 2 (2)
Net actuarial loss (gain) 9 16 26 32
Curtailment loss (gain) (3) 0 (3) 0
Total net expense (benefit) 32 55 85 108
Non-U.S. plans | Postretirement benefit plans        
Service-related expense        
Service cost 0 0 0 0
Interest cost on benefit obligation 37 29 74 57
Expected return on assets (28) (18) (55) (35)
Amortization of unrecognized:        
Prior service cost (benefit) (1) (1) (3) (3)
Net actuarial loss (gain) 5 2 10 5
Curtailment loss (gain) 0 0 0 0
Total net expense (benefit) $ 13 $ 12 $ 26 $ 24