v3.24.2
POSTRETIREMENT BENEFIT PLANS - Effect on Operations of Pension Plans (Details) - Principal pension plans - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]        
Service cost for benefits earned $ 17 $ 24 $ 37 $ 45
Prior service cost amortization 1 0 4 0
Expected return on plan assets (390) (594) (968) (1,188)
Interest cost on benefit obligations 315 472 768 946
Net actuarial gain amortization (103) (187) (257) (359)
Net periodic expense (income) (160) (285) (416) (556)
Discontinued operations        
Defined Benefit Plan Disclosure [Line Items]        
Net periodic expense (income) 0 (96) (88) (188)
Continuing operations        
Defined Benefit Plan Disclosure [Line Items]        
Net periodic expense (income) $ (160) $ (189) $ (328) $ (368)