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Fair Value of Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Other Accounts Receivable | Dec. 31, 2012 Other Accounts Receivable | Jun. 30, 2013 Accrued Expenses | Dec. 31, 2012 Accrued Expenses | Jun. 30, 2013 Other income (expenses), net | Jun. 30, 2012 Other income (expenses), net | Jun. 30, 2013 Other income (expenses), net | Jun. 30, 2012 Other income (expenses), net | Jun. 30, 2013 Other, net | Jun. 30, 2012 Other, net
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward contracts, notional values | $ 249.7 | $ 274.0 |  |  |  |  |  |  |  |  |  |
Fair value of foreign currency forward contracts, liabilities |  |  |  |  | 0.4 | 0.8 |  |  |  |  |  |
Fair value foreign currency forward contracts, assets |  |  | 0.2 | 0.3 |  |  |  |  |  |  |  |
Recognized gains (losses) of foreign currency forward contracts |  |  |  |  |  |  | 2.5 | (5.4) | (2.2) | (4.1) |  |
Change in the fair value of foreign currency forward contracts |  |  |  |  |  |  |  |  |  |  | 2.2 | 4.1
Cash settlements |  |  |  |  |  |  |  |  |  |  | $ (2.5) | $ (4.5)

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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 17 -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 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 + Details
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