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Schedule Ii-Valuation And Qualifying Accounts
 12 Months Ended
Dec. 25, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule Ii-Valuation and Qualifying Accounts
MUELLER INDUSTRIES, INC.
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
Years Ended December 25, 2021, December 26, 2020, and December 28, 2019
  
  Additions  
(In thousands)Balance at beginning of yearCharged to costs and expensesOther additionsDeductionsBalance at end
of year
2021     
Allowance for doubtful accounts
$1,538 $1,216 $— $164 $2,590 
Environmental reserves
$24,001 $4,964 $— $1,539 $27,426 
Valuation allowance for deferred tax assets
$27,199 $108 $642 $1,325 $26,624 
 
2020     
Allowance for doubtful accounts
$770 $1,208 $— $440 $1,538 
Environmental reserves
$20,866 $4,242 $— $1,107 $24,001 
Valuation allowance for deferred tax assets
$23,130 $2,317 $1,898 $146 $27,199 
 
2019
 
 
 
 
 
Allowance for doubtful accounts
$836 $(81)$263 $248 $770 
Environmental reserves
$23,619 $1,659 $— $4,412 $20,866 
Valuation allowance for deferred tax assets
$25,311 $2,919 $290 $5,390 $23,130