Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions								6 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2025	Dec. 17, 2025	Jun. 30, 2025	Apr. 30, 2025	Feb. 03, 2025	Dec. 18, 2024	May 01, 2024	Dec. 31, 2025	Dec. 31, 2025	Dec. 17, 2025	Apr. 30, 2025	Dec. 31, 2024	Dec. 31, 2023	Nov. 08, 2023
Preliminary Allocation
Accrued and other current liabilities														$ (0.2)
Goodwill	$ 1,538.9							$ 1,538.9	$ 1,538.9			$ 1,478.0	$ 1,202.5
Bonded Logic
Acquisitions
Total cash consideration transferred	61.4		$ 60.7
Total cash consideration transferred								0.7
Preliminary Allocation
Receivables, net	3.2		3.2					3.2	3.2
Inventories	4.6		5.0					4.6	4.6
Other current assets	0.0		0.1					0.0	0.0
Property, plant and equipment	13.5		13.5					13.5	13.5
Definite-lived intangible assets	9.0		9.0					9.0	9.0
Other long-term assets	10.2		10.2					10.2	10.2
Accounts payable	(3.3)		(3.3)					(3.3)	(3.3)
Other current liabilities	(2.8)		(5.2)					(2.8)	(2.8)
Other long-term liabilities	(7.7)		(7.7)					(7.7)	(7.7)
Total identifiable net assets	26.7		24.8					26.7	26.7
Goodwill	34.7		$ 35.9					34.7	34.7
Measurement Period Adjustments
Receivables, net								0.0
Inventories								(0.4)
Other current assets								(0.1)
Property, plant and equipment								0.0
Definite-lived intangible assets								0.0
Other long-term assets								0.0
Accounts payable								0.0
Other current liabilities								2.4
Other long-term liabilities								0.0
Total identifiable net assets								1.9
Goodwill								(1.2)
ThermaFoam
Acquisitions
Total cash consideration transferred	53.7				$ 52.9
Total cash consideration transferred									0.8
Preliminary Allocation
Receivables, net	2.9				2.7			2.9	2.9
Inventories	1.4				1.4			1.4	1.4
Other current assets	0.1				0.1			0.1	0.1
Property, plant and equipment	8.8				8.8			8.8	8.8
Definite-lived intangible assets	6.7				6.7			6.7	6.7
Accounts payable	(0.8)				(0.9)			(0.8)	(0.8)
Other current liabilities	(0.3)				(0.6)			(0.3)	(0.3)
Total identifiable net assets	18.8				18.2			18.8	18.8
Goodwill	$ 34.9				$ 34.7			$ 34.9	34.9
Measurement Period Adjustments
Receivables, net									0.2
Inventories									0.0
Other current assets									0.0
Property, plant and equipment									0.0
Definite-lived intangible assets									0.0
Accounts payable									0.1
Other current liabilities									0.3
Total identifiable net assets									0.6
Goodwill									$ 0.2
PFB Holdco, Inc
Acquisitions
Total cash consideration transferred		$ 266.5				$ 268.9
Total cash consideration transferred										$ (2.4)
Preliminary Allocation
Cash and cash equivalents		6.4				6.4				6.4
Receivables, net		9.6				9.6				9.6
Inventories		14.5				14.5				14.5
Prepaid expenses and other current assets		3.8				6.6				3.8
Property, plant and equipment		31.4				31.7				31.4
Definite-lived intangible assets		124.3				112.8				124.3
Other long-term assets		49.4				46.1				49.4
Accounts payable		(3.9)				(4.6)				(3.9)
Accrued and other current liabilities		(11.7)				(27.8)				(11.7)
Deferred income taxes		(30.1)				(27.9)				(30.1)
Other long-term liabilities		(50.9)				(43.5)				(50.9)
Total identifiable net assets		142.8				123.9				142.8
Goodwill		$ 123.7				$ 145.0				123.7
Measurement Period Adjustments
Cash and cash equivalents										0.0
Receivables, net										0.0
Inventories										0.0
Prepaid expenses and other current assets										(2.8)
Property, plant and equipment										(0.3)
Definite-lived intangible assets										11.5
Other long-term assets										3.3
Accounts payable										0.7
Accrued and other current liabilities										16.1
Deferred income taxes										(2.2)
Other long-term liabilities										(7.4)
Total identifiable net assets										18.9
Goodwill										$ (21.3)
MTL Holdings LLC
Acquisitions
Total cash consideration transferred				$ 424.6			$ 423.1
Total cash consideration transferred											$ 1.5
Preliminary Allocation
Cash and cash equivalents				10.3			10.3				10.3
Receivables, net				14.0			14.0				14.0
Inventories				16.8			17.2				16.8
Prepaid expenses and other current assets				0.9			0.9				0.9
Property, plant and equipment				10.4			10.7				10.4
Definite-lived intangible assets				248.3			248.3				248.3
Other long-term assets				8.4			8.1				8.4
Accounts payable				(5.9)			(5.9)				(5.9)
Accrued and other current liabilities				(6.1)			(6.1)				(6.1)
Deferred income taxes				(6.5)			(6.9)				(6.5)
Other long-term liabilities				(7.6)			(6.7)				(7.6)
Total identifiable net assets				283.0			283.9				283.0
Goodwill				$ 141.6			$ 139.2				141.6
Measurement Period Adjustments
Cash and cash equivalents											0.0
Receivables, net											0.0
Inventories											(0.4)
Prepaid expenses and other current assets											0.0
Property, plant and equipment											(0.3)
Definite-lived intangible assets											0.0
Other long-term assets											0.3
Accounts payable											0.0
Accrued and other current liabilities											0.0
Deferred income taxes											0.4
Other long-term liabilities											(0.9)
Total identifiable net assets											(0.9)
Goodwill											$ 2.4