v3.26.1
RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
U.S. plans | Pension plans    
Service-related expense    
Service cost $ 0 $ 0
Interest cost on benefit obligation 109 118
Expected return on assets (144) (150)
Amortization of unrecognized:    
Prior service cost (benefit) 0 0
Net actuarial loss (gain) 52 48
Total net expense (benefit) 17 16
U.S. plans | Postretirement benefit plans    
Service-related expense    
Service cost 0 0
Interest cost on benefit obligation 3 4
Expected return on assets (2) (3)
Amortization of unrecognized:    
Prior service cost (benefit) (3) (2)
Net actuarial loss (gain) (2) (3)
Total net expense (benefit) (4) (4)
Non-U.S. plans | Pension plans    
Service-related expense    
Service cost 32 26
Interest cost on benefit obligation 115 100
Expected return on assets (111) (88)
Amortization of unrecognized:    
Prior service cost (benefit) 0 (1)
Net actuarial loss (gain) 17 16
Total net expense (benefit) 53 53
Non-U.S. plans | Postretirement benefit plans    
Service-related expense    
Service cost 0 0
Interest cost on benefit obligation 37 28
Expected return on assets (27) (17)
Amortization of unrecognized:    
Prior service cost (benefit) (2) (2)
Net actuarial loss (gain) 5 3
Total net expense (benefit) $ 13 $ 12