Summary of Significant Accounting Policies - Balance Sheet Adjustments for Adoption of New Credit Loss Standard (Details) - USD ($) $ in Millions	Apr. 30, 2021	Nov. 01, 2020	Oct. 31, 2020
Current assets
Finance receivables, net	$ 1,360		$ 1,371
Total current assets	4,651		4,577
Finance receivables, net	258		251
Trade and other receivables, net	7		7
Deferred taxes, net	121		117
Total assets	7,084		6,637
Current liabilities
Other current liabilities	1,517		1,453
Total current liabilities	3,889		3,371
Total liabilities	10,724		10,459
Stockholders’ deficit
Total stockholders’ deficit attributable to Navistar International Corporation	(3,643)		(3,826)
Total liabilities and stockholders’ deficit	$ 7,084		6,637
Change Due to New Standard
Current assets
Finance receivables, net			(3)
Total current assets			(3)
Finance receivables, net			(4)
Trade and other receivables, net			(1)
Deferred taxes, net			2
Total assets			(6)
Current liabilities
Other current liabilities			1
Total current liabilities			1
Total liabilities			1
Stockholders’ deficit
Total stockholders’ deficit attributable to Navistar International Corporation			(7)
Total liabilities and stockholders’ deficit			$ (6)
Cumulative Effect, Period of Adoption, Adjusted Balance
Current assets
Finance receivables, net		$ 1,368
Total current assets		4,574
Finance receivables, net		247
Trade and other receivables, net		6
Deferred taxes, net		119
Total assets		6,631
Current liabilities
Other current liabilities		1,454
Total current liabilities		3,372
Total liabilities		10,460
Stockholders’ deficit
Total stockholders’ deficit attributable to Navistar International Corporation		(3,833)
Total liabilities and stockholders’ deficit		$ 6,631