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RETIREMENT BENEFITS PLANS - Changes in Pension and Other Postretirement Liabilities Recognized in AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Pension plans | United States    
Changes in pension and other postretirement benefit liabilities recognized in Accumulated other comprehensive loss    
Balance at January 1 $ 909 $ 871
Prior service cost arising during the year 0 2
Net loss (gain) arising during the year (4) 86
Currency translation 0 0
Less amounts included in expense during the year (55) (50)
Net change for the year (59) 38
Balance at December 31 850 909
Pension plans | Non-United States plans    
Changes in pension and other postretirement benefit liabilities recognized in Accumulated other comprehensive loss    
Balance at January 1 684 661
Prior service cost arising during the year 10 (3)
Net loss (gain) arising during the year 30 62
Currency translation 54 (18)
Less amounts included in expense during the year (25) (18)
Net change for the year 69 23
Balance at December 31 753 684
Other postretirement benefits expense (income)    
Changes in pension and other postretirement benefit liabilities recognized in Accumulated other comprehensive loss    
Balance at January 1 (87) (93)
Prior service cost arising during the year 0 0
Net loss (gain) arising during the year 1 (7)
Currency translation 1 0
Less amounts included in expense during the year 13 13
Net change for the year 15 6
Balance at December 31 $ (72) $ (87)