Annual report [Section 13 and 15(d), not S-K Item 405]

PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details)

v3.25.4
PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amortization:      
Net periodic benefit cost (credit) $ (223) $ (247) $ (204)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (222)    
Pension Benefits      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 28 28 31
Interest cost 210 218 235
Expected return on plan assets (317) (320) (315)
Amortization:      
Net actuarial loss (gain) (8) (1) 3
Prior service costs (credits) 17 18 18
Settlements and special termination benefits 0 (2) (4)
Net periodic benefit cost (credit) (70) (59) (32)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (118)    
OPEB      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 8 8 10
Interest cost 58 50 64
Expected return on plan assets (43) (43) (43)
Amortization:      
Net actuarial loss (gain) (134) (154) (145)
Prior service costs (credits) (13) (15) (17)
Settlements and special termination benefits 7 2 0
Net periodic benefit cost (credit) (117) $ (152) $ (131)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ (104)