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Income Taxes - Narrative (Details) $ / shares in Units, kr in Millions, $ in Millions, ₩ in Billions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
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Apr. 28, 2021 USD ($) | Apr. 28, 2021 DKK (kr) | Jan. 31, 2021 USD ($) | Jan. 31, 2021 DKK (kr) | Jun. 30, 2021 USD ($) $ / shares | Jun. 30, 2020 USD ($) $ / shares | Mar. 31, 2018 USD ($) | Mar. 31, 2018 KRW (₩) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 KRW (₩) | Jun. 30, 2021 USD ($) $ / shares | Jun. 30, 2020 USD ($) $ / shares
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provision for income taxes |  |  |  |  | $ 2.0 | $ 7.7 |  |  |  |  | $ 10.8 | $ 23.7
Effective income tax rate |  |  |  |  | 10.20% | (258.10%) |  |  |  |  | 22.90% | 43.30%
Adjustment for discrete tax expense (benefit), prior year foreign tax return |  |  |  |  | $ (2.6) | $ 3.4 |  |  |  |  | $ (3.8) | $ 4.4
Effective income tax rate reconciliation, expense (benefit) from change in tax rate of foreign jurisdiction |  |  |  |  | (4.5) |  |  |  |  |  | (4.5) |
Effective income tax rate reconciliation, expense (benefit) from other adjustments, amount |  |  |  |  | 1.9 |  |  |  |  |  | 2.3 |
Effective income tax rate reconciliation, expense (benefit) from disposition of business amount |  |  |  |  |  |  |  |  |  |  | (1.6) |
Decrease in foreign income tax |  |  |  |  | $ 0.2 | $ 0.8 |  |  |  |  | $ 0.6 | $ 2.7
Basic earnings per common share (in dollars per share) | $ / shares |  |  |  |  | $ 0 | $ 0.01 |  |  |  |  | $ 0.01 | $ 0.04
Diluted earnings per common share (in dollars per share) | $ / shares |  |  |  |  | $ 0 | $ 0.01 |  |  |  |  | $ 0.01 | $ 0.04
Tax Authority, South Korea (SRTO) | Foreign Tax Authority | Assessment |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Pre-assessment notice, amount |  |  |  |  |  |  | $ 10.0 | ₩ 11.3 | $ 10.4 | ₩ 11.7 |  |
2013 Tax Year | Danish Tax Authority | Foreign Tax Authority |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated tax |  |  | $ 0.6 | kr 3.7 |  |  |  |  |  |  |  |
2014 Tax Year | Danish Tax Authority | Foreign Tax Authority |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated tax |  |  | $ 0.8 | kr 4.9 |  |  |  |  |  |  |  |
2015 Tax Year | Danish Tax Authority | Foreign Tax Authority |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated tax | $ 15.3 | kr 96.1 |  |  |  |  |  |  |  |  |  |

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