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, 2021
Dec. 31, 2020
Dec. 31, 2019
Amortization:      
Net periodic benefit cost (credit) $ (210) $ (54) $ 1
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (107)    
Pension Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 56 23 17
Interest cost 103 64 35
Expected return on plan assets (359) (140) (55)
Amortization:      
Net actuarial loss 32 27 24
Prior service costs (credits) 1 1 1
Settlements (22) (6) 0
Net periodic benefit cost (credit) (189) (31) 22
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost (179)    
Other Postretirement Benefits Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 51 8 2
Interest cost 74 19 10
Expected return on plan assets (40) (20) (17)
Amortization:      
Net actuarial loss 3 3 5
Prior service costs (credits) (2) (2) (2)
Settlements 0 0 0
Net periodic benefit cost (credit) 86 $ 8 $ (2)
Defined Benefit Plan, Expected Amounts [Abstract]      
Estimated net periodic benefit cost $ 72