Debt - Narrative (Details) In Millions, except Share data, unless otherwise specified	3 Months Ended				1 Months Ended		3 Months Ended				1 Months Ended	3 Months Ended				3 Months Ended			3 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2014 USD ($)	Apr. 30, 2014 USD ($)	Mar. 31, 2014 Financial Services Operations [Member] VFN Facility [Member] USD ($)	Dec. 31, 2013 International Truck Leasing Corporation [Member] Financial Services Operations [Member] USD ($)	Jul. 31, 2014 Notes Payable, Other Payables [Member] Financial Services Operations [Member] Investor Notes Maturing 2018 [Member] USD ($)	Nov. 30, 2013 Notes Payable, Other Payables [Member] Financial Services Operations [Member] Investor Notes Maturing 2018 [Member] MXN	Jul. 31, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member]	Apr. 30, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Days	Apr. 30, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] USD ($)	Jul. 31, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] USD ($)	Oct. 31, 2009 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	Apr. 30, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	Aug. 31, 2012 Asset-Based Credit Facility [Member] Manufacturing Operations [Member] USD ($)	Jul. 31, 2014 Notes Payable to Banks [Member] Manufacturing Operations [Member] Eight Point Two Five Percent Senior Notes [Member] USD ($)	Oct. 31, 2013 Notes Payable to Banks [Member] Manufacturing Operations [Member] Eight Point Two Five Percent Senior Notes [Member] USD ($)	Apr. 30, 2014 Minimum [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Days	Apr. 30, 2014 Maximum [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member]	Oct. 31, 2009 Call Option [Member] Convertible Subordinated Debt [Member]	Jul. 31, 2014 Call Option [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member]	Oct. 31, 2009 Call Option [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	Apr. 30, 2014 Other Noncurrent Assets [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] USD ($)	Apr. 30, 2014 Additional Paid-in Capital [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] USD ($)	Jul. 31, 2014 Base Rate [Member] Minimum [Member] Manufacturing Operations [Member] Amended and Restated Asset-Based Credit Facility [Member]	Jul. 31, 2014 Base Rate [Member] Maximum [Member] Manufacturing Operations [Member] Amended and Restated Asset-Based Credit Facility [Member]	Jul. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Minimum [Member] Manufacturing Operations [Member] Amended and Restated Asset-Based Credit Facility [Member]	Jul. 31, 2014 London Interbank Offered Rate (LIBOR) [Member] Maximum [Member] Manufacturing Operations [Member] Amended and Restated Asset-Based Credit Facility [Member]	Jul. 31, 2014 Revolving Credit Facility [Member] Financial Services Operations [Member] Bank Facility [Member] USD ($)	Jul. 03, 2014 Letter of Credit [Member] USD ($)	Jul. 03, 2014 Letter of Credit [Member] Maximum [Member] USD ($)
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate																							1.75%	2.25%	2.75%	3.25%
Debt Instrument, Face Amount			$ 500	$ 21					$ 411		$ 570
Debt Instrument, Interest Rate, Stated Percentage									4.75%					8.25%
Proceeds from Issuance of Senior Long-term Debt									402
Debt Related Commitment Fees and Debt Issuance Costs									9												8	1
Debt Instrument, Unamortized Discount														21	22
Long-term Debt, Fair Value										367
Debt Instrument, Convertible, Carrying Amount of Equity Component										44
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger								130.00%
Debt Instrument, Convertible, Threshold Trading Days																20
Debt Instrument, Convertible, Threshold Consecutive Trading Days								30 days
Debt Instrument, Convertible, Measurement Period, Trading Days, Ending								10
Debt Instrument, Convertible, Measurement Period, Business Days								5
Debt Instrument, Redemption Price, Percentage								100.00%
Option Indexed to Issuer's Equity, Strike Price																			54.07	50.27
Debt Instrument Convertible Conversion Price Percent								100.00%
Threshold percentage of last reported sale price of common stock																	98.00%
Debt Instrument, Convertible, Conversion Ratio							18.4946
Proceeds from Issuance of Warrants											87
Payments for Derivative Instrument, Investing Activities																				125
Option Indexed to Issuer's Equity, Indexed Shares																		11,337,870		11,337,870
Class of Warrant or Right, Exercise Price of Warrants or Rights											60.14
Repayments of Long-term Debt												404
Shares of Call Options Unwound		8,026,456
Shares of Warrants Unwound	6,523,319	6,523,319
Line of Credit Facility, Maximum Borrowing Capacity													175														100		40
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	30
Line of Credit Facility, Participation Fee Reduction, Amount Outstanding in Excess of Maximum Borrowing Capacity																												50
Charge Related to Repurchase of Debt		11
Proceeds from Issuance of Debt					$ 61	800