v3.26.1
Employee Benefit Plans - Contributions (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions $ 72 $ 67 $ 161
Defined benefit plan, expected future employer contributions 160    
Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions 63 56 140
Defined benefit plan, expected future employer contributions 140    
Retiree Health      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions 9 11 21
Defined benefit plan, expected future employer contributions 20    
U.S. Plans | Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions 52 44 112
Defined benefit plan, expected future employer contributions 115    
Non-U.S. Plans | Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions 11 $ 12 $ 28
Defined benefit plan, expected future employer contributions $ 25