v3.26.1
Pension Plans and Other Postretirement Benefits - Pension and Postretirement Plan Contributions (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Retirement Benefits [Abstract]    
Employer contributions $ 14.3 $ 9.9
Expected 2026 contributions $ 19.1