Commitments and Contingencies (Details) $ in Millions	1 Months Ended			3 Months Ended	12 Months Ended
	Feb. 28, 2022 USD ($) MMcf	Jan. 31, 2018 USD ($) unilateral_administrative_order potentially_responsible_party	Nov. 27, 2015 USD ($)	Mar. 26, 2022 USD ($) property smelter_site	Oct. 31, 2008 numberOfImportEntries	Mar. 26, 2022 USD ($)	Mar. 26, 2022 potentially_responsible_party	Sep. 25, 2021 USD ($)	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 | numberOfImportEntries					795
Southeast Kansas Sites
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies, gross	$ 5.6
Geographic boundary of sites | MMcf	50
Lead Refinery Site
Loss Contingencies [Line Items]
Financial guarantee									$ 1.0
Lead Refinery NPL Site
Loss Contingencies [Line Items]
Environmental reserves		$ 4.5
Number of UAOs | unilateral_administrative_order		2
Number of PRPs | potentially_responsible_party		4
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
Non operating Properties | Southeast Kansas Sites
Loss Contingencies [Line Items]
Number of parties involved in settlement negotiations				3			2
Non operating Properties | Shasta Area Mine Sites
Loss Contingencies [Line Items]
Period of permit, implementation of Best Management Practices				10 years
Estimated remediation costs, term				30 years
Non operating Properties | Lead Refinery Site
Loss Contingencies [Line Items]
Number of parties involved in settlement negotiations | potentially_responsible_party							2
Estimated remediation costs, term				15 years
Amount other PRPs will pay to fund cleanup				$ 26.0
Number of surrounding properties | property				300
Non operating Properties | Minimum | Shasta Area Mine Sites
Loss Contingencies [Line Items]
Estimated remediation costs				$ 14.0
Non operating Properties | Minimum | Lead Refinery Site
Loss Contingencies [Line Items]
Estimated remediation costs				1.6
Non operating Properties | Maximum | Shasta Area Mine Sites
Loss Contingencies [Line Items]
Estimated remediation costs				16.0
Non operating Properties | Maximum | Lead Refinery Site
Loss Contingencies [Line Items]
Estimated remediation costs				$ 2.3
Operating Properties | Mueller Copper Tube Products, Inc.
Loss Contingencies [Line Items]
Estimated remediation costs, term				4 years
Operating Properties | Minimum | Mueller Copper Tube Products, Inc.
Loss Contingencies [Line Items]
Estimated remediation costs				$ 0.7
Operating Properties | Maximum | Mueller Copper Tube Products, Inc.
Loss Contingencies [Line Items]
Estimated remediation costs				$ 0.9