Commitments and Contingencies (Details) $ in Millions	1 Months Ended						6 Months Ended	12 Months Ended
	Jul. 24, 2024 USD ($)	Mar. 31, 2022 potentially_responsible_party	Feb. 28, 2022 USD ($) smelter_site ft	Jan. 31, 2018 USD ($) potentially_responsible_party unilateralAdministrativeOrder	Nov. 27, 2015 USD ($)	Aug. 31, 2015 mining_site	Jun. 29, 2024 USD ($) potentially_responsible_party smelter_site property	Oct. 31, 2008 import_entry	Dec. 25, 2021 USD ($)	Dec. 31, 2018 potentially_responsible_party	Nov. 08, 2016 USD ($)	Apr. 19, 2010
Loss Contingencies [Line Items]
Term of guarantees							1 year
Payments required to be made under guarantees, maximum							$ 28.9
United States Department of Commerce Antidumping Review
Loss Contingencies [Line Items]
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries (as a percent)												48.33%
Payment for interest and duties					$ 3.0
Number of import entries | import_entry								795
Southeast Kansas Sites
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, gross			$ 5.6
Geographic boundary of sites | ft			50
Southeast Kansas Sites | Non operating Properties
Loss Contingencies [Line Items]
Number of former smelter sites | smelter_site			3				3
Number of parties involved in settlement negotiations | potentially_responsible_party										2
Southeast Kansas Sites - Lanyon | Operating Properties
Loss Contingencies [Line Items]
Number of properties in remediation | property							1,371
Number of surrounding properties | property							300
Shasta Area Mine Sites | Non operating Properties
Loss Contingencies [Line Items]
Period of permit, implementation of best management practices							10 years
Estimated remediation costs, term							30 years
Shasta Area Mine Sites | Non operating Properties | Minimum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 14.1
Shasta Area Mine Sites | Non operating Properties | Maximum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 16.1
Lead Refinery Site
Loss Contingencies [Line Items]
Financial guarantee											$ 1.0
Lead Refinery Site | Non operating Properties
Loss Contingencies [Line Items]
Number of parties involved in settlement negotiations | potentially_responsible_party							2
Estimated remediation costs, term							13 years
Amount other PRPs will pay to fund cleanup							$ 26.0
Number of surrounding properties | property							300
Lead Refinery Site | Non operating Properties | Minimum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 1.6
Lead Refinery Site | Non operating Properties | Maximum
Loss Contingencies [Line Items]
Estimated remediation costs							2.2
Lead Refinery NPL Site
Loss Contingencies [Line Items]
Number of UAOs | unilateralAdministrativeOrder				2
Number of PRPs | potentially_responsible_party		4		4
Environmental reserves				$ 4.5
Site contingency, total costs				25.0
Site contingency, amount agreed upon to pay PRPs for past costs				2.0
Site contingency, additional reimbursement of past costs				$ 0.7
Contingency charge							$ 7.6
Reserve for settlement									$ 3.3
Lead Refinery NPL Site | Subsequent Event
Loss Contingencies [Line Items]
Litigation settlement	$ 0.1
Bonita Peak Mining District
Loss Contingencies [Line Items]
Number of mining sites | mining_site						48
Mueller Copper Tube Products, Inc. | Operating Properties
Loss Contingencies [Line Items]
Estimated remediation costs, term							2 years
Mueller Copper Tube Products, Inc. | Operating Properties | Minimum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 0.4