Pension and Postretirement Benefits - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Pension Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated cash contributions by the company for current fiscal year	$ 20.0
Cash contributions, pension plans	6.4	$ 14.5	$ 42.4
Postretirement Benefit Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated cash contributions by the company for current fiscal year	4.0
Cash contributions, postretirement benefits	$ 1.3	$ 1.9	$ 5.6