Earnings (Loss) Per Share Attributable to Navistar International Corporation - Basic & Diluted Loss per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Earnings Per Share [Abstract]
Income (loss) from continuing operations, net of tax	$ 55	$ (80)	$ (18)	$ (142)
Net loss attributable to Navistar International Corporation	$ 55	$ (80)	$ (18)	$ (142)
Basic (in shares)	98.8	93.3	98.7	87.5
Weighted Average Number Diluted Shares Outstanding Adjustment	0.7	0.0	0.0	0.0
Diluted (in shares)	99.5	93.3	98.7	87.5
Earnings Per Share, Basic	$ 0.56	$ (0.86)	$ (0.18)	$ (1.62)
Earnings Per Share, Diluted	$ 0.55	$ (0.86)	$ (0.18)	$ (1.62)