Stockholders' Deficit Accumulated Other Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Nov. 01, 2019	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019	Oct. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance	$ (1,912)	$ (2,084)	$ (1,791)	$ (1,912)	$ (1,920)
Other comprehensive loss before reclassifications		(103)	(18)	(111)	(12)
Amounts reclassified out of accumulated other comprehensive loss		24	23	49	146
Net current-period other comprehensive income (loss)		(79)	5	(62)	134
Reclassification of stranded tax effects	189			(189)
Accumulated Other Comprehensive Loss, Ending Balance		(2,163)	(1,786)	(2,163)	(1,786)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Restructuring Charges		0	1	1	1
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		0	0
Tax expense		(7)	1	(2)	20
Net income (loss) attributable to Navistar International Corporation		$ (38)	(48)	$ (74)	(37)
Common stock, shares authorized		220		220		220
Common stock, par value		$ 0.1		$ 0.1		$ 0.1
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance	(321)	$ (329)	(301)	$ (321)	(315)
Other comprehensive loss before reclassifications		(103)	(18)	(111)	(4)
Amounts reclassified out of accumulated other comprehensive loss		0	0	0	0
Net current-period other comprehensive income (loss)		(103)	(18)	(111)	(4)
Reclassification of stranded tax effects				0
Accumulated Other Comprehensive Loss, Ending Balance		(432)	(319)	(432)	(319)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning Balance	$ (1,591)	(1,755)	(1,490)	(1,591)	(1,605)
Other comprehensive loss before reclassifications		0	0	0	(8)
Amounts reclassified out of accumulated other comprehensive loss		24	23	49	146
Net current-period other comprehensive income (loss)		24	23	49	138
Reclassification of stranded tax effects				(189)
Accumulated Other Comprehensive Loss, Ending Balance		(1,731)	(1,467)	(1,731)	(1,467)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Amortization of actuarial loss		24	23	49	47
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Amortization of actuarial loss				0	142
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		(24)	(23)	(49)	(189)
Tax expense		0	0	0	(43)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent		$ 24	$ 23	$ 49	$ 146