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Postretirement and Other Benefits - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Retirement Benefits [Abstract]          
Restricted cash $ 10.4   $ 10.4   $ 0.0
Qualified defined contribution plan costs $ 3.6 $ 3.9 $ 7.4 $ 7.4