Document and Entity Information - shares	9 Months Ended
	Apr. 30, 2021	May 18, 2021
Entity Information [Line Items]
Document Type	10-Q
Entity Registrant Name	BRADY CORP
Amendment Flag	false
Entity Central Index Key	0000746598
Document Period End Date	Apr. 30, 2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--07-31
Document Fiscal Year Focus	2021
Entity Address, Address Line One	6555 West Good Hope Road
Entity Address, City or Town	Milwaukee
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53233
City Area Code	414
Local Phone Number	358-6600
Entity File Number	1-14959
Entity Tax Identification Number	39-0178960
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Document Transition Report	false
Document Quarterly Report	true
Trading Symbol	BRC
Security Exchange Name	NYSE
Title of 12(b) Security	Class A Nonvoting Common Stock, par value $0.01 per share
Entity Incorporation, State or Country Code	WI
Class A nonvoting common stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		48,524,455
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		3,538,628