XML 71 R62.htm IDEA: XBRL DOCUMENT
v3.24.4

Segment Information - Additional Information (Detail) | 9 Months Ended
--- | ---
Dec. 31, 2024 Plant Facility Terminal Location Segment Sector
Segment Reporting [Abstract] |
Number of sectors | Sector | 2
Number of reportable business segments | Segment | 4
Cement plant locations | Location | 8
Slag grinding facility | Facility | 2
Cement distribution terminals | Terminal | 30
Readymix concrete batch plants | 25
Aggregates processing plants | 7
Gypsum wallboard plants | 5
Proportionate consolidation of share of joint venture revenues and operating earnings | 50.00%

X
- Definition Aggregates processing plants. + References No definition available. + Details
Name: | exp_AggregatesProcessingPlants
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cement distribution terminals. + References No definition available. + Details
Name: | exp_CementDistributionTerminals
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cement plant locations. + References No definition available. + Details
Name: | exp_CementPlantLocations
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gypsum wallboard plants. + References No definition available. + Details
Name: | exp_GypsumWallboardPlants
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of sectors. + References No definition available. + Details
Name: | exp_NumberOfSectors
Namespace Prefix: | exp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Readymix plants. + References No definition available. + Details
Name: | exp_ReadymixPlants
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Segment reporting information proportionate consolidation of joint ventures revenues and operating earnings. + References No definition available. + Details
Name: | exp_SegmentReportingInformationProportionateConsolidationOfJointVenturesRevenuesAndOperatingEarnings
Namespace Prefix: | exp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Slag grinding facility. + References No definition available. + Details
Name: | exp_SlagGrindingFacility
Namespace Prefix: | exp_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 47 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-47 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 54 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-54 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration