Annual report pursuant to Section 13 and 15(d)

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

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Components Of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Amortization:      
Net periodic benefit cost (credit) $ (204) $ (212) $ (210)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (212)    
Pension Benefits      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 31 45 56
Interest cost 235 144 103
Expected return on plan assets (315) (355) (359)
Amortization:      
Net actuarial loss (gain) 3 13 32
Prior service costs (credits) 18 5 1
Settlements (4) (8) (22)
Net periodic benefit cost (credit) (32) (156) (189)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (58)    
OPEB      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 10 35 51
Interest cost 64 72 74
Expected return on plan assets (43) (37) (40)
Amortization:      
Net actuarial loss (gain) (145) (43) 3
Prior service costs (credits) (17) (3) (2)
Settlements 0 0 0
Net periodic benefit cost (credit) (131) $ 24 $ 86
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ (154)