Litigation and Related Matters (Narrative) (Details) $ in Millions	1 Months Ended	12 Months Ended				60 Months Ended
	Sep. 30, 2010 Site	Dec. 31, 2023 USD ($) Site	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2007	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Settlement agreement amount of litigation agreement						$ 53.0
Environmental insurance recoveries received in excess of cumulative expenses incurred		$ 2.6	$ 3.5
Reserves for potential environmental liabilities		0.5	1.3	$ 0.2
Other Long-Term Liabilities [Member]
Loss Contingencies [Line Items]
Environmental liabilities		$ 0.5	$ 0.5
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%