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	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Site	Jun. 30, 2022 USD ($)	Dec. 31, 2007	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Settlement agreement amount of litigation agreement						$ 53.0
Environmental insurance recoveries received in excess of cumulative expenses incurred			$ 3.3				$ 3.5
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)		$ 0.6		$ 0.6
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			$ 0.5				$ 0.5