Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in benefit obligations and the fair value of plan assets for our pension and other postretirement benefit plans (Details)

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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in benefit obligations and the fair value of plan assets for our pension and other postretirement benefit plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pension plans      
Changes in benefit obligations      
Benefit obligation at January 1 $ 6,376 $ 8,580  
Service cost 94 93 $ 97
Interest cost 322 232 183
Participant Contributions 5 5  
Foreign currency exchange rate changes 27 (152)  
Amendments 0 9  
Net actuarial loss (gain) 375 (1,891)  
Benefits Paid (369) (500)  
Divestitures 0 (2)  
Settlements (287) (26)  
Curtailments 0 (1)  
Special termination benefits 1 1 3
Other 0 28  
Benefit obligation at December 31 6,544 6,376 8,580
Accumulated Benefit Obligation 6,463 6,307  
Fair value of plan assets      
Fair value of plan assets at January 1 7,158 8,905  
Actual return on plan assets 537 (1,101)  
Employer contributions 44 33  
Participant Contributions 5 5  
Foreign currency exchange rate changes 76 (258)  
Benefits Paid (300) (427)  
Settlements (260) (26)  
Other 0 27  
Fair value of plan assets at December 31 7,260 7,158 8,905
Net liability recognized 716 782  
Settlement charges (credits) 81 (1) 117
Pension plans | Defined Benefit Plan, Funded Plan      
Fair value of plan assets      
Settlements (259)    
Settlement charges (credits) 76    
Pension plans | Change in Assumptions for Defined Benefit Plans      
Changes in benefit obligations      
Net actuarial loss (gain) 129 (1,231)  
Other postretirement benefit plans      
Changes in benefit obligations      
Benefit obligation at January 1 495 696  
Service cost 4 7 9
Interest cost 27 17 15
Participant Contributions 9 11  
Foreign currency exchange rate changes (4) (4)  
Amendments 1 0  
Net actuarial loss (gain) 14 (175)  
Benefits Paid (62) (57)  
Divestitures 0 0  
Settlements (187) 0  
Curtailments 0 0  
Special termination benefits 0 0 0
Other 0 0  
Benefit obligation at December 31 297 495 696
Fair value of plan assets      
Fair value of plan assets at January 1 373 419  
Actual return on plan assets 17 (55)  
Employer contributions 0 0  
Participant Contributions 7 9  
Foreign currency exchange rate changes 0 0  
Benefits Paid (34) 0  
Settlements (187) 0  
Other 0 0  
Fair value of plan assets at December 31 176 373 419
Net liability recognized (121) (122)  
Settlement charges (credits) $ (14) $ 0 $ 0