v3.25.2
Retirement-Related Benefits - Contributions (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Retirement-Related Benefits    
Total plan contributions $ 124 $ 150
Trust for Benefit of Employees    
Retirement-Related Benefits    
Contributions by employer - Noncash 390 390
U.S. nonpension postretirement benefit plan    
Retirement-Related Benefits    
Total plan contributions 104 110
Non-U.S. DB plans and multi-employer plans    
Retirement-Related Benefits    
Total plan contributions $ 20 $ 40