Operating Segments and Related Disclosures - Customers that Represented More than 10% of Net Sales (Parenthetical) (Detail) (Customers [Member], Net Sales [Member])	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
May 31, 2014 United Launch Alliance [Member]	May 31, 2013 United Launch Alliance [Member]	May 31, 2014 United Launch Alliance [Member]	May 31, 2013 Maximum [Member]	May 31, 2013 Maximum [Member]	May 31, 2013 Maximum [Member] United Launch Alliance [Member]
Revenue, Major Customer [Line Items]
Percentage of net sales	25.00%	12.00%	26.00%	10.00%	10.00%	10.00%

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 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: 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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-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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