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Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Fair Value, Measurement Inputs, Disclosure [Line Items] |  |  |
Maturity period limit of foreign currency exchange instruments (in months) | 1 month |  |
Net fair value gain on foreign exchange forward contracts | $ 1.5 | $ 0.6 |
Difference between carrying amount and fair value of long-term debt | 11 |  | 15
Other Income Expense Net |  |  |
Fair Value, Measurement Inputs, Disclosure [Line Items] |  |  |
Gain(loss) on foreign exchange forward contracts | 15.9 | (6.9) |
Prepaid Expenses and Other Current Assets |  |  |
Fair Value, Measurement Inputs, Disclosure [Line Items] |  |  |
Net fair value gain on foreign exchange forward contracts | 2.6 | 1.8 |
Other Accrued Liabilities |  |  |
Fair Value, Measurement Inputs, Disclosure [Line Items] |  |  |
Net fair value gain on foreign exchange forward contracts | (1.1) | (1.2) |
Foreign Exchange Contract |  |  |
Fair Value, Measurement Inputs, Disclosure [Line Items] |  |  |
Notional amount of foreign exchange forward contracts not designated as hedging instruments | $ 421.1 | $ 472.3 |

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- Definition Foreign Currency Derivatives Increase Decrease In Fair Value + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: 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=35706170&loc=SL5580258-113959 Reference 2: 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=35706170&loc=SL5579245-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of long-term debt instruments that have contractual principal amounts and for which the fair value option has been elected. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 + Details
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- Definition Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959 + Details
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