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Income Taxes - Summary of open tax years by major jurisdiction (Details)	12 Months Ended
	Dec. 31, 2020
United States | Minimum
Income Tax Contingency [Line Items]
Open tax year	2015
United States | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
United Kingdom | Minimum
Income Tax Contingency [Line Items]
Open tax year	2019
United Kingdom | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
Ireland | Minimum
Income Tax Contingency [Line Items]
Open tax year	2016
Ireland | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
Canada | Minimum
Income Tax Contingency [Line Items]
Open tax year	2016
Canada | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
Switzerland | Minimum
Income Tax Contingency [Line Items]
Open tax year	2017
Switzerland | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
Denmark | Minimum
Income Tax Contingency [Line Items]
Open tax year	2016
Denmark | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020
Australia | Minimum
Income Tax Contingency [Line Items]
Open tax year	2016
Australia | Maximum
Income Tax Contingency [Line Items]
Open tax year	2020

X

- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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