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Income Tax - Additional Information (Detail) - Dec. 31, 2015 € in Millions, $ in Millions | USD ($) | EUR (€)
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United Kingdom [Member] |  |
Components Of Income Tax Expense Benefit [Line Items] |  |
Taxation loss carryforwards | $ 12.7 |
Spain [Member] |  |
Components Of Income Tax Expense Benefit [Line Items] |  |
Taxation loss carryforwards | 119.8 | € 110.3
Disallowed costs carried forward | 37.2 | 34.2
Spain [Member] | Spanish Tax Authorities [Member] |  |
Components Of Income Tax Expense Benefit [Line Items] |  |
Taxation loss carryforwards | 31.5 | 29.0
Luxembourg [Member] |  |
Components Of Income Tax Expense Benefit [Line Items] |  |
Taxation loss carryforwards | $ 131.3 | € 120.9

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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