v3.25.2
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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 7 $ 6 $ 13 $ 12
Interest cost 149 144 294 288
Expected return on plan assets (212) (216) (416) (435)
Amortization of prior service (credit) cost 0 1 0 1
Recognized actuarial loss 11 7 21 15
Net periodic benefit credit (45) (58) (88) (119)
Settlement loss 5 0 10 0
Net benefit credit (40) (58) (78) (119)
United States        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 63 63 127 125
Expected return on plan assets (73) (75) (146) (151)
Recognized actuarial loss 6 5 12 10
Net periodic benefit credit (4) (7) (7) (16)
Settlement loss 1 0 1 0
Net benefit credit (3) (7) (6) (16)
Foreign Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 7 6 13 12
Interest cost 86 81 167 163
Expected return on plan assets (139) (141) (270) (284)
Amortization of prior service (credit) cost 0 1 0 1
Recognized actuarial loss 5 2 9 5
Net periodic benefit credit (41) (51) (81) (103)
Settlement loss 4 0 9 0
Net benefit credit $ (37) $ (51) $ (72) $ (103)