Stockholders' Deficit Accumulated Other Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended							12 Months Ended
	Sep. 05, 2016	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance				$ (2,640)				$ (2,601)	$ (2,640)	$ (2,601)	$ (2,263)
Other comprehensive loss before reclassifications									275	(170)	(469)
Amounts reclassified out of accumulated other comprehensive loss									154	131	131
Net current-period other comprehensive income (loss)									429	(39)	(338)
Accumulated Other Comprehensive Loss, Ending Balance					$ (2,640)				(2,211)	(2,640)	(2,601)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Total before tax		$ (36)	$ 80	62	$ 34	$ 34	$ (4)	33	(54)	65	154
Tax expense									(10)	(33)	(51)
Net income (loss) attributable to Navistar International Corporation									30	$ (97)	(184)
Debt Instrument, Unamortized Discount									$ 78
Common stock, shares authorized					220.0				220.0	220.0
Common stock, par value					$ 0.10				$ 0.10	$ 0.10
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance				1				1	$ 1	$ 1	1
Other comprehensive loss before reclassifications									(1)	0	0
Amounts reclassified out of accumulated other comprehensive loss									0	0	0
Net current-period other comprehensive income (loss)									(1)	0	0
Accumulated Other Comprehensive Loss, Ending Balance					$ 1				0	1	1
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance				(280)				(287)	(280)	(287)	(127)
Other comprehensive loss before reclassifications									(3)	7	(160)
Amounts reclassified out of accumulated other comprehensive loss									0	0	0
Net current-period other comprehensive income (loss)									(3)	7	(160)
Accumulated Other Comprehensive Loss, Ending Balance					(280)				(283)	(280)	(287)
Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance				$ (2,361)				$ (2,315)	(2,361)	(2,315)	(2,137)
Other comprehensive loss before reclassifications									279	(177)	(309)
Amounts reclassified out of accumulated other comprehensive loss									154	131	131
Net current-period other comprehensive income (loss)									433	(46)	(178)
Accumulated Other Comprehensive Loss, Ending Balance					$ (2,361)				(1,928)	(2,361)	(2,315)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Benefits
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Amortization of prior service costs (benefit)									0	(1)	(4)
Amortization of actuarial loss									138	133	136
Total before tax									161	132	132
Tax expense									(7)	(1)	(1)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent									154	131	131
Volkswagen Truck and Bus GmbH [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer, Pro Forma	16.60%
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer	19.90%
Stock Issued During Period, Shares, New Issues	16.2
Share Price	$ 15.76
Stock Issued During Period, Value, New Issues	$ 256
Insurance Settlement [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Benefits
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax									$ (23)	$ 0	$ 0