Commitments and Contingencies (Details) $ in Millions	1 Months Ended						3 Months Ended	12 Months Ended
	Jul. 31, 2024 USD ($)	Aug. 31, 2023	Mar. 31, 2022 potentially_responsible_party	Feb. 28, 2022 USD ($) smelter_site ft	Jan. 31, 2018 USD ($) potentially_responsible_party unilateralAdministrativeOrder	Aug. 31, 2015 mining_site	Mar. 28, 2026 USD ($) smelter_site property potentially_responsible_party	Oct. 31, 2008 import_entry	Apr. 08, 2026 USD ($)	Dec. 25, 2021 USD ($)	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							$ 27.5
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%
Number of import entries | import_entry								795
United States Department of Commerce Antidumping Review | Southland Pipe Nipples Co., Inc. | Subsequent Event
Loss Contingencies [Line Items]
Duties and interest sought from third party after protests denied									$ 5.1
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
EPA review, term		5 years
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							$ 13.7
Shasta Area Mine Sites | Non operating Properties | Maximum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 14.8
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
Number of surrounding properties | property							300
Estimated remediation costs, term							11 years
Amount other PRPs will pay to fund cleanup							$ 26.0
Lead Refinery Site | Non operating Properties | Minimum
Loss Contingencies [Line Items]
Estimated remediation costs							1.9
Lead Refinery Site | Non operating Properties | Maximum
Loss Contingencies [Line Items]
Estimated remediation costs							2.0
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
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							5 years
Mueller Copper Tube Products, Inc. | Operating Properties | Minimum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 0.9
Mueller Copper Tube Products, Inc. | Operating Properties | Maximum
Loss Contingencies [Line Items]
Estimated remediation costs							$ 1.1