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v3.25.3

Revenue - Additional Information (Detail) | 6 Months Ended
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Sep. 30, 2025
Minimum [Member] |
Supply Commitment [Line Items] |
Revenue from contract with customer collection terms | 30 days
Long term supply agreements term of termination notice period | 2 years
Maximum [Member] |
Supply Commitment [Line Items] |
Revenue from contract with customer collection terms | 75 days
Long term supply agreements term of termination notice period | 3 years

X
- Definition Long term supply agreement term of termination notice period. + References No definition available. + Details
Name: | exp_LongTermSupplyAgreementTermOfTerminationNoticePeriod
Namespace Prefix: | exp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from contract with customer collection terms. + References No definition available. + Details
Name: | exp_RevenueFromContractWithCustomerCollectionTerms
Namespace Prefix: | exp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |