XML 83 R64.htm IDEA: XBRL DOCUMENT
v3.19.2

Segment Information - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2019 USD ($) Location Facility Terminal Plant Sector Segment JointVentures
Segment Reporting Information [Line Items] |
Number of sectors | Sector | 3
Number of reportable business segments | Segment | 5
Cement plant locations | Location | 7
Slag grinding facility | Facility | 1
Cement distribution terminals | Terminal | 19
Gypsum wallboard plants | Plant | 5
Readymix concrete batch plants | Plant | 17
Aggregates processing plants | Plant | 4
Number of frac sand processing facilities | Facility | 2
Number of frac sand drying facilities | Facility | 4
Number of frac sand trans-load locations | Location | 5
Proportionate consolidation of share of Joint Venture's revenues and operating earnings | 50.00%
Accrued capital expenditures | $ | $ 3.7
Cement [Member] |
Segment Reporting Information [Line Items] |
Number of Joint Venture | JointVentures | 1

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 frac sand drying facilities. + References No definition available. + Details
Name: | exp_NumberOfFracSandDryingFacilities
Namespace Prefix: | exp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of frac sand processing facilities. + References No definition available. + Details
Name: | exp_NumberOfFracSandProcessingFacilities
Namespace Prefix: | exp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of frac sand trans-load locations. + References No definition available. + Details
Name: | exp_NumberOfFracSandTransloadLocations
Namespace Prefix: | exp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of joint ventures. + References No definition available. + Details
Name: | exp_NumberOfJointVentures
Namespace Prefix: | exp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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: | num: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 Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
Name: | us-gaap_CapitalExpendituresIncurredButNotYetPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=exp_CementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |