v3.25.2
Employee Benefit Plans (Components of Net Periodic Benefit Cost Included in General and Administrative Expenses) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 47 $ 51 $ 94 $ 103
Interest cost 141 135 282 270
Expected return on plan assets (249) (239) (498) (477)
Amortization of prior service cost 0 (1) 0 (1)
Amortization of actuarial (gain) loss, net 21 23 42 45
Settlements 0 1 (1) 1
Special termination benefits 0 1 0 1
Net periodic (benefit) cost (40) (29) (81) (58)
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 2 2 3 4
Interest cost 14 13 28 26
Expected return on plan assets (18) (19) (36) (38)
Amortization of prior service cost (17) (17) (34) (34)
Amortization of actuarial (gain) loss, net 2 2 5 4
Settlements 0 0 0 0
Special termination benefits 0 0 0 0
Net periodic (benefit) cost $ (17) $ (19) $ (34) $ (38)