CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss	Treasury stock	Noncontrolling interests
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2022		160,366,000
Balance at beginning of year at Dec. 31, 2022		$ 802	$ 297,270	$ 2,059,796	$ (64,175)	$ (502,779)	$ 23,050
Treasury stock beginning balance (in shares) at Dec. 31, 2022						46,363,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under two-for-one stock split (in shares)		0
Issuance of shares under two-for-one stock split		$ 802	(802)
Exercise of stock options, net of shares withheld			786			$ 11,097
Stock-based compensation expense			23,131
Shares withheld for stock option exercises and employee taxes			(8,214)			$ (12,424)
Net income attributable to Mueller Industries, Inc.	$ 602,897			602,897
Dividends paid or payable to stockholders of Mueller Industries, Inc.				(68,393)
Total other comprehensive income (loss) attributable to Mueller Industries, Inc.	17,735				16,954
Issuance of shares under incentive stock option plans (in shares)						(987,000)
Repurchase of common stock (in shares)						516,000
Repurchase of common stock						$ (19,303)
Issuance of restricted stock (in shares)						316,000
Dividends paid to noncontrolling interests							(9,312)
Net income attributable to noncontrolling interests	(6,752)						6,752
Foreign currency translation	21,943						781
Common Stock, Shares, Outstanding, Ending Balance at Dec. 30, 2023		160,366,000
Treasury stock ending balance (in shares) at Dec. 30, 2023						46,208,000
Balance at end of year at Dec. 30, 2023		$ 1,604	312,171	2,594,300	(47,221)	$ (523,409)	21,271
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under two-for-one stock split (in shares)		0
Issuance of shares under two-for-one stock split		$ 0	0
Exercise of stock options, net of shares withheld			338			11,415
Stock-based compensation expense			26,787
Shares withheld for stock option exercises and employee taxes			(8,764)			$ (25,855)
Net income attributable to Mueller Industries, Inc.	604,879			604,879
Dividends paid or payable to stockholders of Mueller Industries, Inc.				(91,341)
Total other comprehensive income (loss) attributable to Mueller Industries, Inc.	(35,749)				(33,058)
Issuance of shares under incentive stock option plans (in shares)						(929,000)
Repurchase of common stock (in shares)						929,000
Repurchase of common stock						$ (48,681)
Issuance of restricted stock (in shares)						407,000
Dividends paid to noncontrolling interests							0
Net income attributable to noncontrolling interests	(12,663)						12,663
Foreign currency translation	$ (30,541)						(2,691)
Common Stock, Shares, Outstanding, Ending Balance at Dec. 28, 2024	113,751,127	160,366,000
Treasury stock ending balance (in shares) at Dec. 28, 2024						46,615,000
Balance at end of year 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]
Issuance of shares under two-for-one stock split (in shares)		0
Issuance of shares under two-for-one stock split		$ 0	0
Exercise of stock options, net of shares withheld			(126)			14,950
Stock-based compensation expense			26,764
Shares withheld for stock option exercises and employee taxes			(12,137)			$ (32,216)
Net income attributable to Mueller Industries, Inc.	765,191			765,191
Dividends paid or payable to stockholders of Mueller Industries, Inc.				(111,454)
Total other comprehensive income (loss) attributable to Mueller Industries, Inc.	29,444				29,444
Issuance of shares under incentive stock option plans (in shares)						(892,000)
Repurchase of common stock (in shares)						3,045,000
Repurchase of common stock						$ (243,615)
Issuance of restricted stock (in shares)						418,000
Investment in Joining Systems							600
Dividends paid to noncontrolling interests							(12,240)
Net income attributable to noncontrolling interests	(8,399)						8,399
Foreign currency translation	$ 23,847						(2,062)
Common Stock, Shares, Outstanding, Ending Balance at Dec. 27, 2025	111,179,750	160,366,000
Treasury stock ending balance (in shares) at Dec. 27, 2025	19,000,000.0					49,186,000
Balance at end of year at Dec. 27, 2025	$ 3,235,906	$ 1,604	$ 345,033	$ 3,761,575	$ (50,835)	$ (847,411)	$ 25,940