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Investments in Unconsolidated Affiliates - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 39 Months Ended
--- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Mar. 30, 2019
Schedule of Equity Method Investments [Line Items] |  |  |
Net loss | $ 29,207 | $ 18,331 |
Tecumseh Products Holdings LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Interest in the joint venture, ownership percentage | 50.00% |  | 50.00%
Net loss | $ 14,600 | 6,200 |
Second Unconsolidated Affiliate [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Interest in the joint venture, ownership percentage | 50.00% |  | 50.00%
Mueller Middle East [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Interest in the joint venture, ownership percentage | 40.00% |  | 40.00%
Net loss | $ 800 | 1,100 |
Cash invested to acquire joint venture interest |  |  | $ 4,500
Labor Claim [Member] | Tecumseh Products Holdings LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Contingency charge |  | $ 3,000 |

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