v3.25.4
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS - Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets $ 1,865 $ 2,161 $ 2,424
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 476 543 603
Defined Benefit Plan, Assets Before Pension Trust | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 1,345 1,361  
Defined Benefit Plan, Assets Before Pension Trust | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 828 783  
Defined Benefit Plan, Assets Before Pension Trust | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 41 35  
Defined Benefit Plan, Assets Before Pension Trust | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 476 543  
Defined Benefit Plan, Assets Before Pension Trust | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 495 800  
Cash and cash equivalents | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 18 52  
Cash and cash equivalents | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 18 52  
Cash and cash equivalents | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Cash and cash equivalents | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Equity securities | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 43 46  
Equity securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 43 46  
Equity securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Equity securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
U.S. equity securities | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 19 20  
U.S. equity securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 19 20  
U.S. equity securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
U.S. equity securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Non - U.S. equity securities | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 24 26  
Non - U.S. equity securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 24 26  
Non - U.S. equity securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Non - U.S. equity securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Fixed income securities | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 27 38  
Fixed income securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Fixed income securities | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 27 38  
Fixed income securities | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Debt - government-issued | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 23 34  
Debt - government-issued | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Debt - government-issued | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 23 34  
Debt - government-issued | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Debt - government-issued | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 141 147  
Debt - corporate-issued | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 4 4  
Debt - corporate-issued | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Debt - corporate-issued | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 4 4  
Debt - corporate-issued | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Alternative investments | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 479 540  
Alternative investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Alternative investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 3 (3)  
Alternative investments | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 476 543  
Real estate | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 90 75  
Real estate | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Real estate | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Real estate | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 90 75 79
Insurance contracts | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 386 468  
Insurance contracts | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Insurance contracts | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Insurance contracts | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 386 468 $ 524
Derivatives - asset position | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 3 0  
Derivatives - asset position | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Derivatives - asset position | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 3 0  
Derivatives - asset position | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Derivatives - liability position | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 (3)  
Derivatives - liability position | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Derivatives - liability position | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 (3)  
Derivatives - liability position | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Other investments | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 778 685  
Other investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 767 685  
Other investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 11 0  
Other investments | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Pooled investment vehicles | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 767 685  
Pooled investment vehicles | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 767 685  
Pooled investment vehicles | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Pooled investment vehicles | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Pooled investment vehicles | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 10 0  
Other investments | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 11 0  
Other investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Other investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 11 0  
Other investments | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 0 0  
Hedge funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 301 552  
Private market securities | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 43 101  
Pension trust receivables | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets 25 0  
Pension trust payables | Level 1, 2 and 3      
Defined Benefit Plan Disclosure [Line Items]      
Pension plan assets $ 0 $ 0