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Income Taxes - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 13, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax [Line Items] |  |  |  |
Tax benefit attributable to outside basis differences recognized as a result of legal entity restructuring |  |  | $ (165.8) |
Deferred tax assets before valuation allowances for state NOLs |  | $ 471.9 |  |
Foreign tax credit |  | 242.0 | 208.0 | $ 239.0
Deferred tax assets that do not satisfy realization criteria |  | 356.5 | 255.0 |
Increase (decrease) in valuation allowance |  | (101.8) |  |
Undistributed earnings of foreign subsidiaries |  | 3,800.0 |  |
Deferred tax liabilities, undistributed foreign earnings |  | 18.6 |  |
Unrecognized tax benefits |  | 413.5 | 391.4 | $ 192.0
Unrecognized tax benefits that would affect our effective tax rate |  | 283.9 |  |
Unrecognized tax benefits increase |  | 22.1 |  |
Increase resulting from legal entity reorganizations |  | 28.8 |  |
Reductions as a result of lapse of statute of limitations |  | 6.7 | 2.0 |
Additional interest and penalties accrued |  | 3.5 | $ (0.5) |
Liability for interest and penalties |  | 6.8 |  |
Federal | Internal Revenue Service (IRS) | Subsequent Event |  |  |  |
Income Tax [Line Items] |  |  |  |
Closure of IRS audit, expected impact | $ 0.0 |  |  |
Capital Loss Carryforward |  |  |  |
Income Tax [Line Items] |  |  |  |
Current Federal, State and Local, Tax Expense |  | 24.1 |  |
Foreign tax credit |  | 9.8 |  |
Current Year Activities |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | 96.7 |  |
Change In Forecasted Earnings in Foreign Jurisdictions |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | (6.0) |  |
Foreign Currency Translation and Tax Rate Changes |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase (decrease) in valuation allowance |  | $ (11.1) |  |

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