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Equity - Treasury Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2013 Navistar Customer concentration risk Sales	Dec. 31, 2013 Common stock Restricted stock	Dec. 31, 2012 Common stock Restricted stock	Jul. 18, 2007 Common stock Navistar
Treasury stock:
Number of shares repurchased				3,600,000
Cost per share repurchased				$ 7.25
Stock repurchased, value				$ 26,100
Costs associated with repurchase				$ 115
Concentration risk percentage	33.00%
Shares paid for tax witholding for share-based compensation		36,329	31,455

X

- Definition

Treasury Stock, Repurchase Costs

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

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Total cost of shares repurchased divided by the total number of shares repurchased.

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