Litigation and Related Matters (Narrative) (Details) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended	48 Months Ended
	Sep. 30, 2010 Site	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($) Site	Dec. 31, 2007	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Settlement agreement amount of litigation agreement					$ 53.0
Environmental insurance recoveries received in excess of cumulative expenses incurred						$ 2.6
Estimated cost for non-groundwater elements			$ 8.0
Reserves for potential environmental liabilities		$ 4.0	$ 4.0
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%
Cost of goods sold [Member]
Loss Contingencies [Line Items]
Reserves for potential environmental liabilities		2.5	$ 2.5
SG&A Expenses [Member]
Loss Contingencies [Line Items]
Reserves for potential environmental liabilities		1.5	1.5
Other Long-Term Liabilities [Member]
Loss Contingencies [Line Items]
Environmental liabilities		$ 4.2	$ 4.2			$ 0.5