Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Balance Sheet (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Oct. 31, 2013
Cash and cash equivalents	$ 547	$ 497	$ 547	$ 755
Marketable securities	293	605
Restricted cash	357	171
Finance and other receivables, net	2,394	2,616
Inventories	1,199	1,319
Investments in non-consolidated affiliates	71	73
Property and equipment, net	1,375	1,562
Goodwill	38	38
Deferred taxes, net (A)	163	200
Other	332	362
Total assets	6,769	7,443
Debt	5,286	5,224
Postretirement benefits liabilities (A)	2,840	2,955
Amounts due to (from) affiliates	0	0
Other liabilities	3,452	3,882
Total liabilities	11,578	12,061
Redeemable equity securities	1	2
Stockholders’ equity attributable to non-controlling interests	7	34
Stockholders’ equity (deficit) attributable to Navistar International Corporation (A)	(4,817)	(4,654)
Total liabilities and stockholders’ deficit	6,769	7,443
Parent Company [Member]
Cash and cash equivalents	226	101
Marketable securities	149	379
Restricted cash	17	19
Finance and other receivables, net	3	0
Inventories	0	0
Investments in non-consolidated affiliates	(7,352)	(7,245)
Property and equipment, net	0	0
Goodwill	0	0
Deferred taxes, net (A)	5	5
Other	35	34
Total assets	(6,917)	(6,707)
Debt	1,968	1,958
Postretirement benefits liabilities (A)	0	0
Amounts due to (from) affiliates	(7,669)	(7,618)
Other liabilities	3,600	3,605
Total liabilities	(2,101)	(2,055)
Redeemable equity securities	1	2
Stockholders’ equity attributable to non-controlling interests	0	0
Stockholders’ equity (deficit) attributable to Navistar International Corporation (A)	(4,817)	(4,654)
Total liabilities and stockholders’ deficit	(6,917)	(6,707)
Guarantor Subsidiaries [Member]
Cash and cash equivalents	44	53
Marketable securities	0	0
Restricted cash	3	4
Finance and other receivables, net	142	124
Inventories	731	792
Investments in non-consolidated affiliates	6,570	6,410
Property and equipment, net	751	827
Goodwill	0	0
Deferred taxes, net (A)	9	25
Other	133	137
Total assets	8,383	8,372
Debt	872	937
Postretirement benefits liabilities (A)	2,651	2,752
Amounts due to (from) affiliates	12,082	11,739
Other liabilities	202	370
Total liabilities	15,807	15,798
Redeemable equity securities	0	0
Stockholders’ equity attributable to non-controlling interests	0	0
Stockholders’ equity (deficit) attributable to Navistar International Corporation (A)	(7,424)	(7,426)
Total liabilities and stockholders’ deficit	8,383	8,372
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	277	343
Marketable securities	144	226
Restricted cash	337	148
Finance and other receivables, net	2,271	2,504
Inventories	481	539
Investments in non-consolidated affiliates	67	71
Property and equipment, net	633	740
Goodwill	38	38
Deferred taxes, net (A)	149	169
Other	166	194
Total assets	4,563	4,972
Debt	2,449	2,336
Postretirement benefits liabilities (A)	189	203
Amounts due to (from) affiliates	(4,590)	(4,267)
Other liabilities	(275)	(22)
Total liabilities	(2,227)	(1,750)
Redeemable equity securities	0	0
Stockholders’ equity attributable to non-controlling interests	7	34
Stockholders’ equity (deficit) attributable to Navistar International Corporation (A)	6,783	6,688
Total liabilities and stockholders’ deficit	4,563	4,972
Deferred tax assets reclassified from NIC	40
Consolidation, Eliminations [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Restricted cash	0	0
Finance and other receivables, net	(22)	(12)
Inventories	(13)	(12)
Investments in non-consolidated affiliates	786	837
Property and equipment, net	(9)	(5)
Goodwill	0	0
Deferred taxes, net (A)	0	1
Other	(2)	(3)
Total assets	740	806
Debt	(3)	(7)
Postretirement benefits liabilities (A)	0	0
Amounts due to (from) affiliates	177	146
Other liabilities	(75)	(71)
Total liabilities	99	68
Redeemable equity securities	0	0
Stockholders’ equity attributable to non-controlling interests	0	0
Stockholders’ equity (deficit) attributable to Navistar International Corporation (A)	641	738
Total liabilities and stockholders’ deficit	$ 740	$ 806
Manufacturing Operations [Member] | Notes Payable to Banks [Member] | Eight Point Two Five Percent Senior Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.25%