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Acquisitions and Dispositions - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 07, 2021 | Jan. 29, 2021 | Sep. 25, 2021 | Jun. 26, 2021 | Jun. 26, 2021 | Jun. 25, 2022 | Dec. 25, 2021 | Oct. 25, 2021 | Sep. 02, 2021 | Jul. 28, 2021
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest in the joint venture, ownership percentage |  |  |  |  |  |  |  |  | 17.00% |
Goodwill, net |  |  |  |  |  | $ 162,630 | $ 171,330 |  |  |
Mueller Middle East | Corporate Joint Venture |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest in the joint venture, ownership percentage | 40.00% |  |  |  |  |  |  |  |  |
Copper Bar | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales of disposed of business |  |  |  | $ 13,400 | $ 24,800 |  |  |  |  |
Disposal group, including discontinued operation, operating income (loss) |  |  |  | 100 | 200 |  |  |  |  |
Consideration for sale of businesses |  |  |  |  |  |  |  | $ 10,100 |  |
Assets of disposed business |  |  |  |  |  |  |  | $ 3,600 |  |
Die-Mold | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales of disposed of business |  |  |  | 4,000 | 7,900 |  |  |  |  |
Net income of disposed business |  |  |  | 800 | 1,400 |  |  |  |  |
Gain (loss) on disposal of businesses |  |  | $ 4,700 |  |  |  |  |  |  |
Consideration for sale of businesses |  |  |  |  |  |  |  |  | $ 22,800 |
Fabricated Tube Products and Shoals Tubular, Inc. | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales of disposed of business |  |  |  | 17,100 | 31,800 |  |  |  |  |
Net income of disposed business |  |  |  | $ 2,800 | $ 5,000 |  |  |  |  |
Gain (loss) on disposal of businesses |  |  | $ 46,600 |  |  |  |  |  |  |
Consideration for sale of businesses |  |  |  |  |  |  |  |  |  | $ 75,700
Assets of disposed business |  |  |  |  |  |  |  |  |  | 32,700
Liabilities of disposed business |  |  |  |  |  |  |  |  |  | $ 3,600
Mueller Middle East |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest in the joint venture, ownership percentage | 15.00% |  |  |  |  |  |  |  |  |
Ownership interest acquired (as a percent) | 55.00% |  |  |  |  |  |  |  |  |
Consideration transferred net of working capital adjustments | $ 20,100 |  |  |  |  |  |  |  |  |
Cash portion of acquisition price | 15,800 |  |  |  |  |  |  |  |  |
Debt assumed | 2,600 |  |  |  |  |  |  |  |  |
Payment for contingent consideration | 1,000 |  |  |  |  |  |  |  |  |
Equity interest issued or issuable | 700 |  |  |  |  |  |  |  |  |
Fair value of assets acquired | 44,800 |  |  |  |  |  |  |  |  |
Fair value of property, plant and equipment acquired | 26,700 |  |  |  |  |  |  |  |  |
Fair value of accounts receivable acquired | 10,700 |  |  |  |  |  |  |  |  |
Fair value of inventories acquired | 4,700 |  |  |  |  |  |  |  |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, current assets, other | 2,700 |  |  |  |  |  |  |  |  |
Fair value of liabilities acquired | 15,600 |  |  |  |  |  |  |  |  |
Fair value of other current liabilities acquired | 11,000 |  |  |  |  |  |  |  |  |
Fair value of accounts payable acquired | 4,600 |  |  |  |  |  |  |  |  |
Goodwill, net | 6,300 |  |  |  |  |  |  |  |  |
Business combination, acquisition of less than 100 percent, noncontrolling interest, fair value | $ 15,400 |  |  |  |  |  |  |  |  |
Hart & Cooley Flexible Duct Business |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Consideration transferred net of working capital adjustments |  | $ 15,300 |  |  |  |  |  |  |  |
Cash portion of acquisition price |  | 14,000 |  |  |  |  |  |  |  |
Payment for contingent consideration |  | 1,300 |  |  |  |  |  |  |  |
Fair value of assets acquired |  | 15,300 |  |  |  |  |  |  |  |
Fair value of property, plant and equipment acquired |  | 10,800 |  |  |  |  |  |  |  |
Fair value of inventories acquired |  | $ 4,500 |  |  |  |  |  |  |  |
Retail Distribution Business |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Interest in the joint venture, ownership percentage |  |  |  |  |  |  |  |  | 17.00% |

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