Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt premium.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_OnePointSevenFivePercentSeniorNotesDueJuneTwelveTwoThousandTwentySevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_ThreePointSixTwoFivePercentSeniorNotesDueMayFifteenTwoThousandThirtyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_TwoPercentSeniorNotesDueJanuaryFourteenTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_FloatingRateNotesDueMayEighteenthTwentyTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_FloatingRateNotesDueSeptemberFourTwentyTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mhk_FloatingRateNotesDueSeptemberEleventhTwentyNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=mhk_EuroInterbankOfferedRateEURIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Senior Notes (Details)									6 Months Ended
Debt - Senior Notes (Details)	Jun. 12, 2020 USD ($)	May 14, 2020 USD ($)	Apr. 07, 2020 USD ($)	Sep. 04, 2019 USD ($)	May 18, 2018 USD ($)	Sep. 11, 2017 USD ($)	Jun. 09, 2015 USD ($)	Jan. 31, 2013 USD ($)	Jun. 27, 2020 USD ($)	Jun. 29, 2019 USD ($)	Jun. 12, 2020 EUR (€)	Sep. 04, 2019 EUR (€)	May 18, 2018 EUR (€)	Sep. 11, 2017 EUR (€)	Jun. 09, 2015 EUR (€)
Debt Instrument [Line Items]
Payment of financing costs									$ 11,896,000	$ 0
Delayed Draw Term Loan
Debt Instrument [Line Items]
Payment of financing costs			$ 1,088,000
Maximum borrowing capacity under credit facility			$ 500,000,000
1.750% Senior Notes due June 12, 2027
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €											€ 500,000,000
Interest rate percentage									1.75%		1.75%
Payment of financing costs	$ 4,855,000
3.625% Senior Notes, payable May 15, 2030; interest payable semi-annually
Debt Instrument [Line Items]
Aggregate principal amount of debts		$ 500,000,000
Interest rate percentage		3.625%							3.625%
Payment of financing costs		$ 5,550,000
3.85% Senior Notes due February 1, 2023
Debt Instrument [Line Items]
Aggregate principal amount of debts								$ 600,000,000
Interest rate percentage								3.85%	3.85%
Payment of financing costs								$ 6,000,000
2.00% Senior Notes due January 14, 2022
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €															€ 500,000,000
Interest rate percentage									2.00%						2.00%
Payment of financing costs							$ 4,218,000
Floating Rate Notes due May 18, 2020
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €													€ 300,000,000
Payment of financing costs					$ 890,000
Floating rate notes due September 04, 2021
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €												€ 300,000,000
Payment of financing costs				$ 754,000
Issuance premium received \| €												€ 744,000
Floating Rate Notes Due September Eleventh Twenty Nineteen [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €														€ 300,000,000
Payment of financing costs						$ 911,000
Euro Interbank Offered Rate (EURIBOR) \| Floating Rate Notes due May 18, 2020
Debt Instrument [Line Items]
Basis spread on debt instrument					0.30%
Euro Interbank Offered Rate (EURIBOR) \| Floating rate notes due September 04, 2021
Debt Instrument [Line Items]
Basis spread on debt instrument				0.20%
Euro Interbank Offered Rate (EURIBOR) \| Floating Rate Notes Due September Eleventh Twenty Nineteen [Member]
Debt Instrument [Line Items]
Basis spread on debt instrument						0.30%