Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions			2 Months Ended
	Sep. 30, 2024	May 01, 2024	Jun. 30, 2024	Dec. 31, 2023
Preliminary Allocation
Goodwill	$ 1,342.0			$ 1,202.5
MTL Holdings LLC
Acquisitions
Total cash consideration transferred	424.6	$ 423.1
Preliminary Allocation
Cash and cash equivalents	10.3	10.3
Receivables, net	14.0	14.0
Inventories	17.2	17.2
Prepaid expenses and other current assets	0.9	0.9
Property, plant and equipment	10.7	10.7
Definite-lived intangible assets	248.3	248.3
Other long-term assets	8.1	8.1
Accounts payable	(5.9)	(5.9)
Accrued and other current liabilities	(6.1)	(6.1)
Deferred income taxes	(6.9)	(6.9)
Other long-term liabilities	(6.7)	(6.7)
Total identifiable net assets	283.9	283.9
Goodwill	$ 140.7	$ 139.2
MTL Holdings LLC | Measurement Period Adjustments
Acquisitions
Total cash consideration transferred			$ 1.5
Measurement Period Adjustments
Cash and cash equivalents			0.0
Receivables, net			0.0
Inventories			0.0
Prepaid expenses and other current assets			0.0
Property, plant and equipment			0.0
Definite-lived intangible assets			0.0
Other long-term assets			0.0
Accounts payable			0.0
Accrued and other current liabilities			0.0
Deferred income taxes			0.0
Other long-term liabilities			0.0
Total identifiable net assets			0.0
Goodwill			$ 1.5