Cover - USD ($)	12 Months Ended
	Jul. 31, 2022	Sep. 09, 2022	Jan. 31, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--07-31
Document Period End Date	Jul. 31, 2022
Document Transition Report	false
Entity File Number	1-7891
Entity Registrant Name	DONALDSON COMPANY, INC.
Entity Incorporation, State	DE
Entity Tax Identification Number	41-0222640
Entity Address, Street Address	1400 West 94th Street
Entity Address, City	Minneapolis
Entity Address, State	MN
Entity Address, Postal Zip Code	55431
City Area Code	952
Local Phone Number	887-3131
Title of each class	Common Stock, $5.00 par value
Trading Symbol(s)	DCI
Name of each exchange on which registered	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 6,840,687,805
Entity Common Stock, Shares Outstanding		122,497,515
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement for its 2022 annual meeting of stockholders (the “2022 Proxy Statement”) are incorporated by reference in Part III, as specifically set forth in Part III.
Entity Central Index Key	0000029644
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false