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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive (Loss) Income [Member] | Treasury Stock [Member] | Noncontrolling Interest [Member] | Total
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Balance at Dec. 31, 2011 | $ 401 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 266,936 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 682,380 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (49,409)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (44,620)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 29,074 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Balance (in shares) at Dec. 31, 2011 | 80,183 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 3,710 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Common stock: |  |  |  |  |  |  |
Issuance of shares under two-for-one stock split | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Additional paid-in capital: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans |  | (4,303)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 20,881 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Stock-based compensation expense |  | 6,136 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Income tax benefit from exercise of stock options |  | 2,528 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Issuance of restricted stock |  | (3,471)us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 3,471 us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Retained earnings: |  |  |  |  |  |  |
Net income attributable to Mueller Industries, Inc. |  |  | 82,395 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  | 82,395 us-gaap_NetIncomeLoss
Dividends paid or payable to stockholders of Mueller Industries, Inc. |  |  | (14,998)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  |
Accumulated other comprehensive (loss) income: |  |  |  |  |  |  |
Total other comprehensive (loss) income attributable to Mueller Industries, Inc. |  |  |  | 6,786 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  |  |
Treasury stock: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans (in shares) |  |  |  |  | (1,152)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock (in shares) |  |  |  |  | 21,710 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock |  |  |  |  | (448,205)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Issuance of restricted stock (in shares) |  |  |  |  | (284)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Noncontrolling interest: |  |  |  |  |  |  |
Net income attributable to noncontrolling interest |  |  |  |  |  | 1,278 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 1,278 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Foreign currency translation |  |  |  |  |  | 706 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 8,070 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Balance at Dec. 29, 2012 | 401 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 267,826 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 749,777 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (42,623)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (468,473)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 31,058 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Balance (in shares) at Dec. 29, 2012 | 80,183 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 23,984 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Common stock: |  |  |  |  |  |  |
Issuance of shares under two-for-one stock split | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Additional paid-in capital: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans |  | (1,205)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 4,716 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Stock-based compensation expense |  | 5,704 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Income tax benefit from exercise of stock options |  | 719 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Issuance of restricted stock |  | (5,902)us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 5,902 us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Retained earnings: |  |  |  |  |  |  |
Net income attributable to Mueller Industries, Inc. |  |  | 172,600 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  | 172,600 us-gaap_NetIncomeLoss
Dividends paid or payable to stockholders of Mueller Industries, Inc. |  |  | (14,103)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  |
Accumulated other comprehensive (loss) income: |  |  |  |  |  |  |
Total other comprehensive (loss) income attributable to Mueller Industries, Inc. |  |  |  | 31,804 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  |  |
Treasury stock: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans (in shares) |  |  |  |  | (244)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock (in shares) |  |  |  |  | 140 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock |  |  |  |  | (3,738)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Issuance of restricted stock (in shares) |  |  |  |  | (302)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Noncontrolling interest: |  |  |  |  |  |  |
Net income attributable to noncontrolling interest |  |  |  |  |  | 689 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 689 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Foreign currency translation |  |  |  |  |  | 715 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 3,285 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Balance at Dec. 28, 2013 | 401 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 267,142 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 908,274 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (10,819)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (461,593)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 32,462 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 735,867 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 28, 2013 | 80,183 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 23,578 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Common stock: |  |  |  |  |  |  |
Issuance of shares under two-for-one stock split | 401 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (401)us-gaap_AdjustmentsToAdditionalPaidInCapitalStockSplit / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Additional paid-in capital: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans |  | (1,646)us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 4,504 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Stock-based compensation expense |  | 6,265 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Income tax benefit from exercise of stock options |  | 837 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Issuance of restricted stock |  | (3,622)us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  | 3,819 us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Retained earnings: |  |  |  |  |  |  |
Net income attributable to Mueller Industries, Inc. |  |  | 101,560 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  | 101,560 us-gaap_NetIncomeLoss
Dividends paid or payable to stockholders of Mueller Industries, Inc. |  |  | (17,036)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |  |
Accumulated other comprehensive (loss) income: |  |  |  |  |  |  |
Total other comprehensive (loss) income attributable to Mueller Industries, Inc. |  |  |  | (32,104)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  |  |
Treasury stock: |  |  |  |  |  |  |
Issuance of shares under incentive stock option plans (in shares) |  |  |  |  | (208)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock (in shares) |  |  |  |  | 107 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Repurchase of common stock |  |  |  |  | (3,832)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Issuance of restricted stock (in shares) |  |  |  |  | (195)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |
Noncontrolling interest: |  |  |  |  |  |  |
Net income attributable to noncontrolling interest |  |  |  |  |  | 974 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 974 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Foreign currency translation |  |  |  |  |  | (152)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (6,766)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Balance at Dec. 27, 2014 | $ 802 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 268,575 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 992,798 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (42,923)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ (457,102)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 33,284 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 795,434 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 27, 2014 | 80,183 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 23,282 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |

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