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Income Taxes Incomes Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Mar. 31, 2021 | Jul. 31, 2020
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Income tax provision (benefit) | $ 46.0 | $ 13.0 |  | $ (57.0) | $ (33.0) |  |
Effective Income Tax Rate Reconciliation, Percent | 34.30% | 155.00% |  | 12.30% | 9.40% |  |
Decrease resulting from settlements with taxing authorities |  |  | $ 19.0 |  |  |  |
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount |  |  |  | $ 36.0 | $ 25.0 |  |
Less: Net earnings attributable to noncontrolling interest | $ 94.0 | $ 32.0 |  | $ 189.0 | $ 83.0 |  |
Effective Income Tax Rate Reconciliation, period increase/(decrease) due to noncontrolling interest | 14.00% | 121.60% |  | 8.70% | 3.00% |  |
Income Tax Examination, Interest Income, Net of Tax |  |  | 13.0 |  |  |  |
Deferred Tax Assets, Capital Loss Carryforwards |  | $ 90.0 |  |  | $ 90.0 |  |
Deferred Tax Assets, Valuation Allowance |  | $ 90.0 |  |  | $ 90.0 |  |
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority |  |  | 108.0 |  |  |  |
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority, Withholding Tax Matter |  |  |  |  |  | $ 20.0 | $ 2.0
Tax Years 2012-2016 |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Decrease resulting from settlements with taxing authorities | $ 15.0 |  |  |  |  |  |
Domestic Tax Authority |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Income Tax Examination, Interest Income |  |  | $ 16.0 |  |  |  |

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