XML 148 R127.htm IDEA: XBRL DOCUMENT v3.25.4

Financial Instruments and Contingent Consideration (Schedule of Weighted-average of Significant Unobservable Inputs) (Details)	Dec. 31, 2025
Insolcorp L L C [Member] | Volatility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Volatility	25.90%
Insolcorp L L C [Member] | Discount Rates [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rates	3.60%
Geometrik [Member] | Volatility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Volatility	23.40%
Geometrik [Member] | Discount Rates [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rates	3.60%

X

- Definition

Fair value of weighted average unobservable input Discount rate as percentage.

+ References

No definition available.

+ Details

Name:	awi_FairValueWeightedAverageUnobservableInputDiscountRatePercentage
Namespace Prefix:	awi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fair value of weighted average unobservable input volatility as percentage.

+ References

No definition available.

+ Details

Name:	awi_FairValueWeightedAverageUnobservableInputVolatilityPercentage
Namespace Prefix:	awi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-SubTopic 10
-Topic 825
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-13

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-12

+ Details

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

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=awi_InsolcorpLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=awi_GeometrikMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: