CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated other comprehensive loss	Treasury Stock	Noncontrolling Interest
Balance at beginning of period at Dec. 30, 2023		$ 1,604	$ 312,171	$ 2,594,300	$ (47,221)	$ (523,409)	$ 21,271
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Acquisition of shares under incentive stock option plans			282
Stock-based compensation expense			6,231
Net income attributable to Mueller Industries, Inc.	$ 138,363			138,363
Dividends paid or payable to stockholders of Mueller Industries, Inc.				(22,713)
Total other comprehensive income (loss) attributable to Mueller Industries, Inc.	(5,154)				(4,533)
Acquisition of shares under incentive stock option plans						(2,771)
Repurchase of common stock						(27,930)
Investment in Joining Systems JV							0
Dividends paid to noncontrolling interests							0
Net income attributable to noncontrolling interests	(3,346)						3,346
Foreign currency translation	(4,155)						(621)
Balance at end of period at Mar. 30, 2024		1,604	318,684	2,709,950	(51,754)	(554,110)	23,996
Balance at beginning of period at Dec. 28, 2024	2,804,408	1,604	330,532	3,107,838	(80,279)	(586,530)	31,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Acquisition of shares under incentive stock option plans			763
Stock-based compensation expense			6,150
Net income attributable to Mueller Industries, Inc.	157,432			157,432
Dividends paid or payable to stockholders of Mueller Industries, Inc.				(27,643)
Total other comprehensive income (loss) attributable to Mueller Industries, Inc.	4,646				5,442
Acquisition of shares under incentive stock option plans						(5,257)
Repurchase of common stock						(243,615)
Investment in Joining Systems JV	600
Dividends paid to noncontrolling interests							(12,240)
Net income attributable to noncontrolling interests	(1,855)						1,855
Foreign currency translation	2,919						(796)
Balance at end of period at Mar. 29, 2025	$ 2,687,099	$ 1,604	$ 337,445	$ 3,237,627	$ (74,837)	$ (835,402)	$ 20,662