Document and Entity Information - shares	6 Months Ended
	Jan. 31, 2018	Feb. 16, 2018
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, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		256,111,064