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Postretirement Benefits - Schedule Of Net Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Components of net periodic benefit cost:    
Net periodic benefit cost (benefit) $ 14 $ (56)
Pension Benefits | U.S. Plans    
Components of net periodic benefit cost:    
Service cost 0 0
Interest cost 153 156
Expected return on plan assets (180) (175)
Amortization of prior service cost (credit) 0 0
Net periodic benefit cost (benefit) (27) (19)
Pension Benefits | Non-U.S. Plans    
Components of net periodic benefit cost:    
Service cost 11 11
Interest cost 28 30
Expected return on plan assets (40) (42)
Amortization of prior service cost (credit) 0 0
Net periodic benefit cost (benefit) (1) (1)
Other Postretirement Benefits    
Components of net periodic benefit cost:    
Service cost 16 17
Interest cost 31 33
Expected return on plan assets (2) (2)
Amortization of prior service cost (credit) (1) (3)
Net periodic benefit cost (benefit) $ 44 $ 45