v3.24.1.u1
Employee Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Pension Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 34 $ 31
Interest cost 57 55
Expected return on plan assets (69) (63)
Amortization of unrecognized (gain) loss 5 2
Amortization of prior service credit 0 0
Total 27 25
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1 1
Interest cost 10 10
Expected return on plan assets 0 0
Amortization of unrecognized (gain) loss (7) (9)
Amortization of prior service credit (23) (28)
Total $ (19) $ (26)