Document and Entity Information - shares	6 Months Ended
	Jan. 31, 2019	Feb. 15, 2019
Document and Entity Information [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-Q
Document Period End Date	Jan. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		259,072,994
Emerging Growth Company	false
Entity Small Business	false