Commitments and Contingencies - Summary of Environmental Reserves and Recoveries (Detail) (Reserve for Environmental Costs [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Reserve for Environmental Costs [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Estimated Recoverable Amounts Under U.S. Government Contracts	$ 9.8	$ 3.7	$ 17.5	$ 5.3
Expense to Unaudited Condensed Consolidated Statement of Operations	5.4	1.9	8.0	5.4
Total Environmental Reserve Adjustments	$ 15.2	$ 5.6	$ 25.5	$ 10.7

Amount of the estimated recovery from third parties recorded in the period for an individual site that reduces environmental remediation expense.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 30

-Section 50

-Paragraph 10

-Subparagraph (d)(3)

-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total increases or decreases in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

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