Document and Entity Information Document	6 Months Ended
	Apr. 30, 2019 shares
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	nav
Entity Registrant Name	NAVISTAR INTERNATIONAL CORP
Entity Central Index Key	0000808450
Current Fiscal Year End Date	--10-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	99,147,546