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Income Taxes - Balance Sheet Location (Details) - Foreign Tax Authority - Danish Tax Authority (SKAT) - Tax Years Post 2011 kr in Millions, $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2020 DKK (kr)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 DKK (kr)	Dec. 31, 2019 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Income Tax Examination [Line Items]
Income tax liability	kr 1,126.3	$ 177.4	kr 1,110.6	$ 166.7
Tax deposit	1,180.9		970.1		$ 186.0	$ 145.6
Accrued expenses and other current liabilities
Income Tax Examination [Line Items]
Income tax liability	847.3	133.5	847.3	127.2
Tax deposit	847.3		847.3		133.5	127.2
Other noncurrent liabilities
Income Tax Examination [Line Items]
Income tax liability	279.0	$ 43.9	263.3	$ 39.5
Other non-current assets
Income Tax Examination [Line Items]
Tax deposit	kr 333.6		kr 122.8		$ 52.5	$ 18.4

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Income Tax Examination, Accrued Tax and Interest

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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