Litigation and Related Matters (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended	60 Months Ended
	Sep. 30, 2010 Site	Mar. 31, 2025 USD ($) Site	Mar. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2007	Dec. 31, 2021 USD ($)	Dec. 31, 2024 USD ($)
Loss Contingencies [Line Items]
Settlement agreement amount of litigation agreement						$ 53.0
Estimated cost for non-groundwater elements				$ 8.0
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]		Liabilities, Noncurrent					Liabilities, Noncurrent
Environmental liabilities		$ 4.1					$ 4.6
Reserves for potential environmental liabilities		$ 0.0	$ 0.0
Macon Site [Member]
Loss Contingencies [Line Items]
Number of landfills listed as Superfund site | Site		2
Number of landfills AWI entered into an Administrative Order on Consent for a Removal Action | Site	1
Submission date of final report to EPA	Oct. 31, 2016
Elizabeth City [Member]
Loss Contingencies [Line Items]
Percentage of site costs Navy agreed to pay					33.33%
Other Long-Term Liabilities [Member]
Loss Contingencies [Line Items]
Environmental liabilities		$ 4.1					4.2
Accounts Payable and Accrued Expenses [Member]
Loss Contingencies [Line Items]
Environmental liabilities							$ 0.4