Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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A description of the limitations on the use of all operating loss carryforwards available to reduce future taxable income.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Income Tax - Additional Information (Details) € in Millions, $ in Millions	12 Months Ended	36 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)
United Kingdom
Operating Loss Carryforwards [Line Items]
Taxation loss carryforwards	$ 64.5	$ 64.5		$ 67.6
Spain
Operating Loss Carryforwards [Line Items]
Taxation loss carryforwards	123.7	123.7	€ 110.3	126.3	€ 110.3
Disallowed costs carried forward	$ 15.1	15.1	13.5	23.6	20.7
Carryforward limitation (in years)	P18Y
Luxembourg
Operating Loss Carryforwards [Line Items]
Taxation loss carryforwards	$ 127.9	$ 127.9	€ 114.1	$ 125.7	€ 109.9
Carryforward limitation (in years)		P17Y