EBP, Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share

No definition available.

+ Details

Name:	mbc_EBPBusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare
Namespace Prefix:	mbc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate

+ References

No definition available.

+ Details

Name:	mbc_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate
Namespace Prefix:	mbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-3

+ Details

Name:	us-gaap-ebp_EbpSubsequentEventLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=mbc_EBP001Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS - Additional Information (Details) - EBP 001 - shares			12 Months Ended
	May 28, 2026	Jan. 01, 2026	Dec. 31, 2025
EBP, Subsequent Event [Line Items]
Automatic deferral rate, annual increase			1.00%
Automatic deferral rate			3.00%
Maximum
EBP, Subsequent Event [Line Items]
Automatic deferral rate			8.00%
Subsequent Event
EBP, Subsequent Event [Line Items]
Automatic deferral rate, annual increase		1.00%
Common stock portion, number of MasterBrand stock for each share of American Woodmark stock converted	5.150
Subsequent Event \| Maximum
EBP, Subsequent Event [Line Items]
Automatic deferral rate		12.00%