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Income Taxes - Components of Company's Deferred Tax Assets and Liabilities (Footnote) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards | $ 878.3
SPAIN |
Operating Loss Carryforwards [Line Items] |
Tax losses and disallowed finance costs | $ 15.1
Carryforward term (in years) | P18Y
Norway |
Operating Loss Carryforwards [Line Items] |
Tax losses and disallowed finance costs | $ 15.0
Carryforward term (in years) | P10Y
LUXEMBOURG |
Operating Loss Carryforwards [Line Items] |
Carryforward term (in years) | P17Y

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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://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 + Details
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