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Income Taxes - Reconciliation Of The U.S. Federal Statutory Income Tax Rate (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 06, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |  |
U.S. federal statutory rate (as a percent) |  | 21.00% | 21.00% | 21.00%
Increase (decrease) resulting from: |  |  |  |
State and local taxes, net of federal tax benefit |  | (1.40%) | (2.60%) | (1.00%)
Impact of U.S. Tax Reform and related effects |  | 0 | 0 | 0.047
Impact of foreign operations |  | 7.60% | 3.80% | (1.20%)
Impact of U.S. tax method changes |  | 0.00% | 0.00% | (6.40%)
Impact of the Domestication | (35.70%) | (35.70%) | 0.00% | 0.00%
Change in valuation allowance and related effects |  | (24.40%) | 1.80% | 0.60%
Non-deductible share-based compensation costs |  | 1.70% | (0.50%) | (0.50%)
U.S. federal R&D credit |  | (3.60%) | (3.70%) | (1.10%)
Nondeductible officer compensation |  | 1.10% | 1.50% | 0.40%
Other |  | (0.10%) | 1.40% | 0.10%
Total |  | (33.80%) | 22.70% | 16.60%
Expense (benefit) for reduction in deferred tax liability for undistributed foreign earnings, amount |  |  |  | $ 31.8
Expense (benefit) for reduction in deferred tax liability for undistributed foreign earnings, percent |  |  |  | 4.20%
Executive compensation deduction |  |  |  | $ 1.8
Executive compensation deduction, percent |  |  |  | 0.30%
Expense for mandatory repatriation tax, amount |  |  |  | $ 1.5
Expense for mandatory repatriation tax, percent |  |  |  | 0.002
Impact of U.S. tax method changes |  |  |  | $ 48.2
Recognition of deferred tax assets, net | $ 63.0 |  |  |
Change in valuation allowance, benefit |  | $ 49.4 |  |
Change in valuation allowance, benefit, percent |  | 28.00% |  |
Foreign |  |  |  |
Increase (decrease) resulting from: |  |  |  |
Change in valuation allowance, benefit |  | $ 61.8 | $ 11.2 | $ 135.2
Change in valuation allowance, benefit, percent |  | 35.00% | 4.00% | 17.90%
Change in valuation allowance, expense |  | $ 61.8 | $ 11.2 | $ 135.2
Change in valuation allowance, expense, percent |  | 35.00% | 4.00% | 17.90%

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