Cover Page	3 Months Ended
	Oct. 31, 2020 shares
Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-12622
Entity Registrant Name	OIL-DRI CORPORATION OF AMERICA
Entity Central Index Key	0000074046
Current Fiscal Year End Date	--07-31
Document Period End Date	Oct. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-2048898
Entity Address, Address Line One	410 North Michigan Avenue
Entity Address, Address Line Two	Suite 400
Entity Address, Postal Zip Code	60611-4213
Entity Address, State or Province	IL
Entity Address, City or Town	Chicago
City Area Code	312
Local Phone Number	321-1515
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.10 per share
Trading Symbol	ODC
Security Exchange Name	NYSE
Common Stock
Entity Information
Entity Common Stock, Shares Outstanding	5,399,728
Common Class B
Entity Information
Entity Common Stock, Shares Outstanding	2,066,650