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=114775744&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=6877327&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=114775744&loc=d3e28541-108399

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedPremium
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=118932676&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_LongtermDebtTypeAxis=mhk_FloatingRateNotesDueSeptemberFourTwentyTwentyOneMember
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_FloatingRateNotesDueSeptemberEleventhTwentyNineteenMember
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_ThreePointEightFivePercentSeniorNotesDueFebruaryOneTwoThousandTwentyThreeMember
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)						9 Months Ended
Debt - Senior Notes (Details)	Sep. 04, 2019 USD ($)	May 18, 2018 USD ($)	Sep. 11, 2017 USD ($)	Jun. 09, 2015 USD ($)	Jan. 31, 2013 USD ($)	Sep. 28, 2019 USD ($)	Sep. 29, 2018 USD ($)	Sep. 04, 2019 EUR (€)	May 18, 2018 EUR (€)	Sep. 11, 2017 EUR (€)	Jun. 09, 2015 EUR (€)
Debt Instrument [Line Items]
Payment of financing costs						$ 757,000	$ 864,000
Floating rate notes due September 04, 2021
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €								€ 300,000,000
Issuance premium received \| €								€ 744,000
Payment of financing costs	$ 754,000
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 11, 2019
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €										€ 300,000,000
Payment of financing costs			$ 911,000
2.00% Senior Notes due January 14, 2022
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €											€ 500,000,000
Payment of financing costs				$ 4,218,000
Interest rate percentage						2.00%					2.00%
3.85% Senior Notes due February 1, 2023
Debt Instrument [Line Items]
Aggregate principal amount of debts					$ 600,000,000
Payment of financing costs					$ 6,000,000
Interest rate percentage					3.85%	3.85%
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 May 18, 2020
Debt Instrument [Line Items]
Basis spread on debt instrument		0.30%
Euro Interbank Offered Rate (EURIBOR) \| Floating Rate Notes due September 11, 2019
Debt Instrument [Line Items]
Basis spread on debt instrument			0.30%