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Pension, Other Postretirement Benefits and Savings Plans - Selected Pension Plan Information (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
UNITED STATES    
All plans:    
Accumulated benefit obligation $ 3,374 $ 3,650
Plans not fully-funded:    
Projected benefit obligation 72 292
Accumulated benefit obligation 66 283
Fair value of plan assets 0 203
Foreign Plan [Member]    
All plans:    
Accumulated benefit obligation 2,062 2,330
Plans not fully-funded:    
Projected benefit obligation 515 905
Accumulated benefit obligation 482 858
Fair value of plan assets $ 130 $ 445