v3.26.1
RETIREMENT BENEFITS PLANS - Benefits Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension plans | UNITED STATES        
Retirement benefits plans expense (income)        
Service cost $ 1 $ 4 $ 2 $ 8
Interest cost 30 34 60 68
Expected return on plan assets (47) (47) (95) (95)
Amortization 6 3 12 7
Total (10) (6) (21) (12)
Settlements, curtailments, and termination benefits 16 9 28 18
Total expense (income) 6 3 7 6
Pension plans | Non-United States        
Retirement benefits plans expense (income)        
Service cost 13 11 25 22
Interest cost 23 23 46 44
Expected return on plan assets (34) (33) (67) (64)
Amortization 5 4 11 8
Total 7 5 15 10
Settlements, curtailments, and termination benefits 1 3 2 5
Total expense (income) 8 8 17 15
Other postretirement benefits expense (income)        
Retirement benefits plans expense (income)        
Service cost 0 0 0 0
Interest cost 2 3 4 5
Expected return on plan assets 0 0 0 0
Amortization (2) (3) (5) (6)
Total 0 0 (1) (1)
Settlements, curtailments, and termination benefits 0 0 0 0
Total expense (income) $ 0 $ 0 $ (1) $ (1)