Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Jul. 31, 2018	Aug. 24, 2018	Jan. 31, 2018
DEI [Abstract]
Entity Registrant Name	INTUIT INC
Entity Central Index Key	0000896878
Current Fiscal Year End Date	--07-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Jul. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		258,671,620
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 41