v3.24.0.1
Post-Employment Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined benefit plans      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost $ 270 $ 454 $ 440
Interest cost 432 297 237
Expected return on plan assets (723) (712) (663)
Amortization of prior service cost 1 2 2
Amortization of actuarial loss (16) (231) (288)
Net periodic benefit cost (credit) (4) 272 304
Other post-employment plans      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service cost 37 51 48
Interest cost 37 23 19
Amortization of prior service cost (36) (38) (39)
Amortization of actuarial loss (12) (26) (32)
Net periodic benefit cost (credit) $ 50 $ 62 $ 60