v3.8.0.1

Financial Instruments and Fair Value Measurements - Foreign Currency Contracts Activity (Parenthetical) (Detail) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) Contracts | Sep. 30, 2016 USD ($) Contracts
Derivative Instruments And Hedging Activities Disclosure [Abstract] |  |  |  |
Number of forward and option contracts exercised | Contracts |  |  | 33 | 41
Gains (losses) from forward and option contracts exercised | $ | $ 1.6 | $ (3.1) | $ 10.5 | $ (1.2)

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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 + Details
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