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Long-Term Debt (Senior Notes) (Details) (USD $) | 12 Months Ended | 0 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 31, 2013 | Nov. 03, 2014 | Aug. 15, 2014 | Jan. 17, 2006
Debt Instrument [Line Items] |  |  |  |  |  |  |
Increase in interest expense per quarter for .25% increase in notes per $100,000 of outstanding notes | $ 98,207,000 us-gaap_InterestExpense | $ 92,246,000 us-gaap_InterestExpense | $ 74,713,000 us-gaap_InterestExpense |  |  |  |
3.85% Senior Notes Due February 1, 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate principal amount of debts |  |  |  | 600,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mhk_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember |  |  |
Interest rate percentage | 3.85%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mhk_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember |  |  | 3.85%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mhk_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember |  |  |
Payment of financing costs |  |  |  | 6,000,000 us-gaap_PaymentsOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = mhk_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember |  |  |
6.125% Notes, Payable January 15, 2016 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate principal amount of debts |  |  |  |  |  |  | 900,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember
Interest rate percentage | 6.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |  |  |  |  |  | 6.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember
Increase in interest rate from rating agency Downgrade | 0.25%mhk_IncreaseInInterestRateFromRatingAgencyDowngrade / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |  |  |  |  |  |
Maximum increase in interest rate per agency from rating agency downgrade | 1.00%mhk_MaximumIncreaseInInterestRatePerAgencyFromRatingAgencyDowngrade / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |  |  |  |  |  |
Increase in interest expense per quarter for .25% increase in notes per $100,000 of outstanding notes | 63,000 us-gaap_InterestExpense / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |  |  |  |  |  |
Incremental increase in outstanding notes |  |  |  |  |  |  | 100,000,000 mhk_IncrementalIncreaseInOutstandingNotes / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember
Amount of debt repurchased |  |  |  |  | 54,400,000 us-gaap_DebtInstrumentRepurchaseAmount / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember | 200,000,000 us-gaap_DebtInstrumentRepurchaseAmount / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |
Price as a percentage of the principal amount debt repurchased |  |  |  |  | 106.38%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember | 107.73%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |
6.125% Notes, Payable January 15, 2016 [Member] | Interest Expense [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Premium from redeeming senior notes |  |  |  |  | 3,500,000 mhk_DebtInstrumentRedemptionPremium / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember | 15,450,000 mhk_DebtInstrumentRedemptionPremium / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |
Fees resulting from redemption of senior notes |  |  |  |  |  | $ 1,080,000 mhk_DebtInstrumentRedemptionFee / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember / us-gaap_LongtermDebtTypeAxis = mhk_SixPointOneTwoFivePercentNotesPayableJanuaryFifteenTwoThousandSixteenMember |

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