Operating Segments and Related Disclosures - Sales to U.S. Government and its Agencies (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Revenue, Major Customer [Line Items]
Net sales	$ 403.1	$ 286.6	$ 732.8	$ 530.3
U. S. Government Sales [Member]
Revenue, Major Customer [Line Items]
Net sales	$ 385.1	$ 273.5	$ 694.2	$ 506.6
U. S. Government Sales [Member] \| Net Sales [Member] \| Customers [Member]
Revenue, Major Customer [Line Items]
Percentage of net sales	96.00%	95.00%	95.00%	96.00%

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

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-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

-SubTopic 10

-Section 50

-Paragraph 18

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

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