Sales to Major Customer As Percentage of Consolidated Net Sales (Detail) (Sales Revenue, Goods, Net, Customer Concentration Risk)	12 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Chrysler LLC
Concentration Risk [Line Items]
Concentration risk, percentage	20.00%	17.00%	17.00%
U.S. Steel
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	22.00%	15.00%
Ford Motor Company
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%	12.00%	18.00%

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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Topic 825

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