v3.25.1
Retirement Benefits (Defined Benefit Plan Net Periodic Benefit Cost Combined U.S. and Significant Non-U.S. Plans) (Details) - Pension Benefits - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 6 $ 6
Interest cost 145 144
Expected return on plan assets (204) (219)
Recognized actuarial loss 10 8
Net periodic benefit credit (43) (61)
Settlement loss 5 0
Net benefit credit (38) (61)
United States    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost 64 62
Expected return on plan assets (73) (76)
Recognized actuarial loss 6 5
Net periodic benefit credit (3) (9)
Foreign Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 6 6
Interest cost 81 82
Expected return on plan assets (131) (143)
Recognized actuarial loss 4 3
Net periodic benefit credit (40) (52)
Settlement loss 5 0
Net benefit credit $ (35) $ (52)