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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Examination [Line Items] |  |  |  |
Notional interest deduction ("NID") | $ 40.0 | $ 40.0 | $ 0.0 |
State charitable contribution carryover ("SCCCs") | 0.7 | 0.7 | 0.9 |
Deferred tax liabilities | 2.0 | 2.0 |  |
Accrued income taxes | 1.6 | 1.6 |  |
Unrecognized tax benefits | 4.5 | 4.5 | 17.6 |
Income tax penalties and interest expense, benefit |  | 4.0 | 6.9 |
Accrued interest and penalties | 1.0 | 1.0 | 5.0 |
Settlements of uncertain tax positions with tax authorities |  | 34.0 | 0.0 |
Tax benefit |  |  | 14.7 |
Tax liability |  |  | 37.8 |
Income tax benefit (provision) | 4.8 | (103.4) | $ (119.0) | $ (198.3)
Income taxes receivable, current | 24.8 | 24.8 |  |
Tax deposit | 7.6 | 7.6 |  |
Deferred tax assets | 21.6 | 21.6 |  |
Income taxes receivable, noncurrent | 30.1 | 30.1 |  |
US State |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Operating loss carryforwards, valuation allowance | 56.3 | 56.3 |  |
Foreign |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Operating loss carryforwards, valuation allowance | $ 29.5 | 29.5 |  |
Danish Tax Authority (SKAT) |  |  |  |
Income Tax Examination [Line Items] |  |  |  |
Income tax benefit, net |  | 8.9 |  |
Income tax benefit, gross |  | 10.5 |  |
Overpayment of interest |  | $ 1.6 |  |

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