v3.26.3
Employee Benefit Plans - Contributions (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Employer contributions $ 118 $ 123 $ 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 105 108 140
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 13 15 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 88 89 112
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 17 $ 19 $ 28
Defined benefit plan, expected future employer contributions $ 25