Commitments and Contingencies - Narrative (Details) BRL in Millions				1 Months Ended	3 Months Ended				9 Months Ended
	Jun. 01, 2016 USD ($) bus	Mar. 31, 2016 USD ($)	Jul. 16, 2015 USD ($)	Mar. 31, 2014 BRL	Jul. 31, 2016 USD ($) site	Jul. 31, 2016 BRL	Jan. 31, 2014 BRL	Jul. 31, 2010 BRL	Jul. 31, 2016 USD ($) dealer site	Jul. 31, 2016 BRL site	Oct. 31, 2015 USD ($)	Jul. 31, 2015 engine
Loss Contingencies [Line Items]
Available stand-by letters of credit and surety bonds					$ 97,000,000				$ 97,000,000
Purchase commitments					16,000,000				$ 16,000,000
Long Term Purchase Commitment Cancellation Fees					$ 59,000,000
Number of Contaminated Sites | site					2				2	2
Number of Contaminated Sites in Sao Paulo, Brazil | site					2				2	2
Accrual for environmental loss contingencies					$ 20,000,000				$ 20,000,000
Sao Paulo Groundwater Notice [Member] | Sanctions [Member]
Loss Contingencies [Line Items]
Damages sought, value				BRL 3	1,000,000
International Chamber of Commerce [Member] | Penalties and Interest [Member]
Loss Contingencies [Line Items]
Damages sought, value					20,000,000
Navitrucks [Member] | Alleged Unfulfilled Promises and Injury to Reputation [Member]
Loss Contingencies [Line Items]
Damages sought, value					$ 40,000,000
Damages from Product Defects [Member]
Loss Contingencies [Line Items]
Notice of Violation, number | engine												7,749
Civil penalties sought, per violation			$ 37,500
G E Operating Agreement [Member]
Loss Contingencies [Line Items]
Operating Agreement Excess Loss Percentage					10.00%	10.00%
Loss Sharing Agreement, Percentage					9.50%				9.50%	9.50%
Off Balance Sheet Finance Receivables					$ 1,400,000,000				$ 1,400,000,000		$ 1,400,000,000
Off Balance Sheet Finance Receivables Related Originations1					2,400,000,000				2,400,000,000		2,300,000,000
G E Operating Agreement [Member]
Loss Contingencies [Line Items]
Equipment leased to others					57,000,000				57,000,000		102,000,000
Manufacturing Operations [Member] | Financed lease obligations [Member]
Loss Contingencies [Line Items]
Long-term Debt					61,000,000				61,000,000		111,000,000
Manufacturing Operations [Member] | G E Operating Agreement [Member] | Financed lease obligations [Member]
Loss Contingencies [Line Items]
Long-term Debt					61,000,000				61,000,000		$ 110,000,000
Pending Litigation [Member] | Disputes [Member]
Loss Contingencies [Line Items]
Damages sought, value					50,000,000
Pending Litigation [Member] | FATMA Notice, Trial [Member] | Penalties [Member]
Loss Contingencies [Line Items]
Damages sought, value					1,000,000			BRL 2
IIAA Vs. Navitrucks [Member]
Loss Contingencies [Line Items]
Gain Contingency, Unrecorded Amount					40,000,000				40,000,000
IIAA Vs. Navitrucks [Member] | International Chamber of Commerce [Member] | Penalties and Interest [Member]
Loss Contingencies [Line Items]
Damages sought, value					23,000,000
Navitrucks Vs. IIAA [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss					$ 43,000,000				$ 43,000,000
Polar Express School Bus and Lakeview Bus Lines v. Navistar, Inc and IC Bus LLC [Member] | Pending Litigation [Member] | Damages from Product Defects [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Buses | bus	40
Loss Contingency, Damages Sought, Value, Compensatory Damages	$ 6,700,000
Loss Contingency, Damages Sought, Value, Punitive Damages	$ 50,000,000
SEC v. Navistar [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Paid, Value		$ 7,500,000
Brazil, Brazil Real | International Chamber of Commerce [Member] | Penalties and Interest [Member]
Loss Contingencies [Line Items]
Damages sought, value | BRL							BRL 64
Brazil, Brazil Real | Navitrucks [Member] | Alleged Unfulfilled Promises and Injury to Reputation [Member]
Loss Contingencies [Line Items]
Damages sought, value | BRL							BRL 128
Brazil, Brazil Real | IIAA Vs. Navitrucks [Member]
Loss Contingencies [Line Items]
Gain Contingency, Unrecorded Amount | BRL										BRL 130
Brazil, Brazil Real | IIAA Vs. Navitrucks [Member] | International Chamber of Commerce [Member] | Penalties and Interest [Member]
Loss Contingencies [Line Items]
Damages sought, value | BRL						BRL 73
Brazil, Brazil Real | Navitrucks Vs. IIAA [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss | BRL										BRL 139
International Indústria de Motores da América do Sul Ltda [Member] | Other Cases Vs. International Indústria de Motores da América do Sul Ltda [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Truck Dealers | dealer									2
Loss Contingency, Number of Truck Fleet Owners | dealer									2