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Income Taxes - Balance Sheet Location (Details) kr in Millions, $ in Millions | Mar. 31, 2021 DKK (kr) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 DKK (kr) | Dec. 31, 2020 USD ($)
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Income Tax Examination [Line Items] |  |  |  |
Tax liability | kr 1,144.6 | $ 180.4 | kr 1,142.3 | $ 187.5
Tax deposit | 1,180.9 | 186.1 | 1,180.9 | 193.9
Accrued expenses and other current liabilities |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax liability | 847.3 | 133.5 | 847.3 | 139.1
Tax deposit | 847.3 | 133.5 | 847.3 | 139.1
Other noncurrent liabilities |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax liability | 297.3 | 46.9 | 295.0 | 48.4
Other non-current assets |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Tax deposit | kr 333.6 | $ 52.6 | kr 333.6 | $ 54.8

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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=84230637&loc=d3e32718-109319 + Details
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