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Document and Entity Information
Jun. 17, 2021
Cover [Abstract]  
Entity Registrant Name EAGLE MATERIALS INC
Amendment Flag false
Entity Central Index Key 0000918646
Document Type 8-K
Document Period End Date Jun. 17, 2021
Entity Incorporation State Country Code DE
Entity File Number 1-12984
Entity Tax Identification Number 75-2520779
Entity Address, Address Line One 5960 Berkshire Lane
Entity Address, Address Line Two Suite 900
Entity Address, City or Town Dallas
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75219
City Area Code (214)
Local Phone Number 432-2000
Written Communications false
Entity Emerging Growth Company false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, $0.01 par value
Trading Symbol EXP
Security Exchange Name NYSE