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Pension, Other Postretirement Benefits and Savings Plans - Changes in Benefit Obligation and Plan Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in benefit obligation:      
Curtailments/settlements/termination benefits $ (3) $ 40 $ 124
UNITED STATES      
Change in plan assets:      
Beginning balance 203    
Ending balance 0 203  
Foreign Plan [Member]      
Change in plan assets:      
Beginning balance 445    
Ending balance 130 445  
Pension Plan [Member]      
Change in benefit obligation:      
Service cost — benefits earned (21)    
Actuarial loss 1 16  
Pension Plan [Member] | UNITED STATES      
Change in benefit obligation:      
Beginning balance (3,659) (4,084)  
Service cost — benefits earned (7) (8) (13)
Interest cost (174) (195) (133)
Plan amendments 3 0  
Actuarial loss 107 (98)  
Participant contributions 0 0  
Curtailments/settlements/termination benefits 13 355  
Foreign currency translation 0 0  
Benefit payments 337 371  
Ending balance (3,380) (3,659) (4,084)
Change in plan assets:      
Beginning balance 3,724 4,174  
Actual return on plan assets 61 290  
Company contributions to plan assets (5) (18)  
Cash funding of direct participant payments 17 4  
Participant contributions 0 0  
Settlements (13) (355)  
Foreign currency translation 0 0  
Benefit payments (337) (371)  
Ending balance 3,447 3,724 4,174
Funded status at end of year 67 65  
Pension Plan [Member] | Foreign Plan [Member]      
Change in benefit obligation:      
Beginning balance (2,392) (2,227)  
Service cost — benefits earned (19) (18) (24)
Interest cost (105) (108) (60)
Plan amendments 0 0  
Actuarial loss 131 (116)  
Participant contributions (3) (3)  
Curtailments/settlements/termination benefits 12 21  
Foreign currency translation 105 (83)  
Benefit payments 160 142  
Ending balance (2,111) (2,392) (2,227)
Change in plan assets:      
Beginning balance 2,146 2,043  
Actual return on plan assets (49) 102  
Company contributions to plan assets (31) (42)  
Cash funding of direct participant payments 26 26  
Participant contributions 3 3  
Settlements (12) (16)  
Foreign currency translation (79) 88  
Benefit payments (160) (142)  
Ending balance 1,906 2,146 2,043
Funded status at end of year (205) (246)  
Other Postretirement Benefits Plan [Member]      
Change in benefit obligation:      
Beginning balance (287) (292)  
Service cost — benefits earned (2) (2) (3)
Interest cost (15) (16) (12)
Plan amendments 28 0  
Actuarial loss 11 (1)  
Participant contributions (6) (7)  
Curtailments/settlements/termination benefits 0 0  
Foreign currency translation 8 (1)  
Benefit payments 31 32  
Ending balance (232) (287) (292)
Change in plan assets:      
Beginning balance 0 0  
Actual return on plan assets 0 0  
Company contributions to plan assets 0 0  
Cash funding of direct participant payments 25 25  
Participant contributions 6 7  
Settlements 0 0  
Foreign currency translation 0 0  
Benefit payments (31) (32)  
Ending balance 0 0 $ 0
Funded status at end of year (232) (287)  
Other Postretirement Benefits Plan [Member] | UNITED STATES      
Change in plan assets:      
Funded status at end of year 153 195  
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]      
Change in plan assets:      
Funded status at end of year $ 79 $ 92