Consolidated Statements of Stockholders Equity Statement - USD ($)	Total	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Common & Class B Stock	Treasury Stock	Noncontrolling Interest Agromex	Parent Oil-Dri Corporation of America
Total, Beginning of Period at Jul. 31, 2018	$ 131,885,000	$ 38,473,000	$ 158,935,000	$ (10,615,000)	$ (18,000)	$ 1,056,000	$ (55,946,000)
Common & Class B Stock, Beginning of Period (in shares) at Jul. 31, 2018						10,555,828
Treasury Stock, Beginning of Period (in shares) at Jul. 31, 2018							(3,238,833)
Net Income	12,615,000	0		0		$ 0	$ 0
Net (Loss) Income Attributable to Noncontrolling Interest	4,000				4,000
Net Income Attributable to Oil-Dri	12,611,000		12,611,000
Other Comprehensive Income (Loss)	(4,424,000)	0	0	(4,424,000)	0	0	0
Dividends Declared	(6,790,000)	0	(6,790,000)	0	0	0	0
Purchases of Treasury Stock	(147,000)	0	0	0	0	$ 0	$ (147,000)
Purchases of Treasury Stock (in shares)							(4,905)
Net Issuance of Stock Under Long-Term Incentive Plans (in shares)						304,850	(7,550)
Net issuance of stock under long-term incentive plans	(1,000)	419,000	0	0	0	$ 30,000	$ (450,000)
Amortization of Restricted Stock	2,408,000	2,408,000	0	0	0	0	0
Total, End of Period at Jul. 31, 2019	135,546,000	41,300,000	164,756,000	(15,039,000)	(14,000)	$ 1,086,000	$ (56,543,000)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2019						10,860,678
Treasury Stock, End of Period (in shares) at Jul. 31, 2019							(3,251,288)
Net Income	18,740,000	0		0		$ 0	$ 0
Net (Loss) Income Attributable to Noncontrolling Interest	(160,000)				(160,000)
Net Income Attributable to Oil-Dri	18,900,000		18,900,000
Other Comprehensive Income (Loss)	2,785,000	0	0	2,785,000	0	0	0
Dividends Declared	(7,077,000)	0	(7,077,000)	0	0	0	0
Purchases of Treasury Stock	(5,541,000)	0	0	0	0	$ 0	$ (5,541,000)
Purchases of Treasury Stock (in shares)							(169,058)
Net Issuance of Stock Under Long-Term Incentive Plans (in shares)						25,727	(5,700)
Net issuance of stock under long-term incentive plans	1,000	183,000	0	0	0	$ 3,000	$ (185,000)
Amortization of Restricted Stock	3,368,000	3,368,000	0	0	0	0	0
Contributions from noncontrolling interests	142,000	142,000	0	0	0	0	0
Total, End of Period at Jul. 31, 2020	$ 147,964,000	$ 44,993,000	$ 176,579,000	$ (12,254,000)	$ (174,000)	$ 1,089,000	$ (62,269,000)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2020						10,886,405
Treasury Stock, End of Period (in shares) at Jul. 31, 2020							(3,426,046)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent									$ 724,000
Noncontrolling Interest, Parent Ownership Percentage Prior to Purchase of Additional Interest									52.00%
Noncontrolling Interest, Ownership Percentage by Parent									78.40%
Noncontrolling Interest Ownership Percentage Prior to Parent's Purchase of Additional Interest								48.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners								21.60%