v3.26.1
RETIREMENT BENEFITS - Narrative (Details) - Pension Benefits
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Defined benefit plan, expected future employer contributions $ 550
Payment for pension benefits 178
Defined Benefit Plan, Underfunded Plan  
Defined Benefit Plan Disclosure [Line Items]  
Defined benefit plan, expected future employer contributions 400
Payment for pension benefits $ 97