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Income Taxes (Details) kr in Millions, $ in Millions	3 Months Ended			9 Months Ended			12 Months Ended
	Sep. 30, 2020 DKK (kr)	Mar. 31, 2020 DKK (kr)	Sep. 30, 2019	Sep. 30, 2020 DKK (kr)	Sep. 30, 2020 USD ($)	Sep. 30, 2019	Dec. 31, 2019 DKK (kr)	Dec. 31, 2019 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Income Tax Examination [Line Items]
Effective income tax provision (as a percent)	25.20%		26.50%	26.50%	26.50%	29.00%
Danish Tax Authority (SKAT) | Foreign Tax Authority | Tax Years Post 2011
Income Tax Examination [Line Items]
Income tax liability				kr 1,126.3	$ 177.4		kr 1,110.6	$ 166.7
Tax deposit	kr 1,180.9			kr 1,180.9			kr 970.1		$ 186.0	$ 145.6
Danish Tax Authority (SKAT) | Foreign Tax Authority | Tax Years 2012-2013
Income Tax Examination [Line Items]
Income tax liability	kr 76.8	kr 134.0

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Income Tax Examination, Accrued Tax and Interest

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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-Topic 740
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