Cover Page - shares	9 Months Ended
	Apr. 30, 2021	May 28, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 30, 2021
Document Transition Report	false
Entity File Number	001-35394
Entity Registrant Name	Guidewire Software, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-4468504
Entity Address, Address Line One	2850 S. Delaware St., Suite 400
Entity Address, City or Town	San Mateo
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94403
City Area Code	650
Local Phone Number	357-9100
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	GWRE
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		83,154,725
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001528396
Current Fiscal Year End Date	--07-31