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Financial Instruments and Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2013 | Jan. 31, 2012 | Oct. 31, 2012
Debt Instrument [Line Items] |  |  |
Approximate reclassification of net loss from accumulated other comprehensive income | $ 0.5 |  |
Total notional amount of interest rate derivatives | 150 |  |
Weighted average of variable interest rate | 0.21% |  | 0.21%
Weighted average of fixed interest rate | 0.75% |  | 0.75%
Realized losses on interest rate derivatives related to statement of operations | 0.2 | 0.4 |
Other comprehensive (gain)loss on interest rate derivatives | (0.4) | 0.6 |
Notional amount of outstanding foreign currency forward contracts | 183.5 |  | 233.2
(Gains) losses recorded under fair value contracts | (1.7) | 1.5 |
Fair value of contract recorded in accumulated other comprehensive income | (0.7) | 0.1 | (0.9)
Loss on foreign currency forward contracts related to other comprehensive income |  | 0.4 | 0.4
Realized losses on Energy hedges related to statement of operations |  | 0.2 |
(Gain) on energy hedge included in accumulated other comprehensive income |  | (1.0) |
Carrying amount of long-term debt | 1,315.2 |  | 1,200.3
Restructuring-related expenses on long lived assets | 0.1 | 1.8 |
Net book value of long lived assets | 0.1 | 1.9 |
Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Estimated fair value long-term debt | 328.1 |  | 330.8
Carrying amount of long-term debt | 302.2 |  | 302.3
Senior Notes due 2019 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Estimated fair value long-term debt | 292.5 |  | 286.9
Carrying amount of long-term debt | 243.8 |  | 243.6
Senior Notes due 2021 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Estimated fair value long-term debt | 305.0 |  | 283.4
Carrying amount of long-term debt | $ 266.2 |  | $ 256.0

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15D -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611 + Details
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