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Pensions And Other Postretirement Benefits - Contributions and Plan Amendments (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions to defined contribution plans $ 742,000,000 $ 724,000,000 $ 606,000,000
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Years of service 30 years    
Employer contributions $ 753,000,000 403,000,000 438,000,000
Pension Plan | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions 357,000,000 71,000,000 67,000,000
Pension Plan | Non-U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Estimated contributions in next fiscal year 700,000,000    
Employer contributions 395,000,000 332,000,000 371,000,000
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions 348,000,000 387,000,000  
Other Postretirement Benefits Plan | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions 295,000,000 $ 335,000,000 $ 351,000,000
Pension Plan and Other Postretirement Benefits Plan | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Revised monthly basic benefit 5.00    
Annual contribution 500    
Increase in pension obligation $ 791,000,000