v3.26.1
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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 7 $ 7 $ 13 $ 13
Interest cost 144 149 288 294
Expected return on plan assets (220) (212) (440) (416)
Recognized actuarial loss 24 11 47 21
Net periodic benefit cost (credit) (45) (45) (92) (88)
Settlement loss 0 5 2 10
Net benefit cost (credit) (45) (40) (90) (78)
United States        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 62 63 124 127
Expected return on plan assets (70) (73) (140) (146)
Recognized actuarial loss 9 6 18 12
Net periodic benefit cost (credit) 1 (4) 2 (7)
Settlement loss 0 1 0 1
Net benefit cost (credit) 1 (3) 2 (6)
Foreign Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 7 7 13 13
Interest cost 82 86 164 167
Expected return on plan assets (150) (139) (300) (270)
Recognized actuarial loss 15 5 29 9
Net periodic benefit cost (credit) (46) (41) (94) (81)
Settlement loss 0 4 2 9
Net benefit cost (credit) $ (46) $ (37) $ (92) $ (72)