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Income Taxes - Balance Sheet Location (Details) kr in Millions, $ in Millions	Sep. 30, 2021 DKK (kr)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 DKK (kr)	Dec. 31, 2020 USD ($)
Income Tax Examination [Line Items]
Tax liability	kr 312.4	$ 48.6	kr 1,142.3	$ 187.5
Tax deposit	317.8	49.5	1,180.9	193.9
Accrued expenses and other current liabilities
Income Tax Examination [Line Items]
Tax liability	0.0	0.0	847.3	139.1
Other noncurrent liabilities
Income Tax Examination [Line Items]
Tax liability	312.4	48.6	295.0	48.4
Prepaid expenses and other current assets
Income Tax Examination [Line Items]
Tax deposit	0.0	0.0	847.3	139.1
Other non-current assets
Income Tax Examination [Line Items]
Tax deposit	kr 317.8	$ 49.5	kr 333.6	$ 54.8

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Income Tax Examination, Accrued Tax and Interest

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- Definition

The amount of estimated penalties and interest accrued as of the balance sheet date 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=121826272&loc=d3e32718-109319

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