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
	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 ($)	Apr. 30, 2014 Notes Payable, Other Payables [Member] Financial Services Operations [Member] Investor Notes Maturing 2018 [Member] USD ($)	Nov. 30, 2013 Notes Payable, Other Payables [Member] Financial Services Operations [Member] Investor Notes Maturing 2018 [Member] MXN	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 ($)	Oct. 31, 2009 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	Apr. 30, 2014 Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	Apr. 30, 2014 Notes Payable to Banks [Member] Manufacturing Operations [Member] Eight Point Two Five Percent Senior Notes [Member] USD ($)	Oct. 31, 2013 Notes Payable to Banks [Member] Manufacturing Operations [Member] Eight Point Two Five Percent Senior Notes [Member] USD ($)	Apr. 30, 2014 Minimum [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Days	Apr. 30, 2014 Maximum [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member]	Oct. 31, 2009 Call Option [Member] Convertible Subordinated Debt [Member]	Apr. 30, 2014 Call Option [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member]	Oct. 31, 2009 Call Option [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Three Point Zero Percent Senior Subordinated Convertible Notes [Member] USD ($)	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 ($)	Apr. 30, 2014 Additional Paid-in Capital [Member] Convertible Subordinated Debt [Member] Manufacturing Operations [Member] Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] USD ($)
Debt Instrument [Line Items]
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
Charge Related to Repurchase of Debt	11
Proceeds from Issuance of Debt				$ 61	800