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Income Taxes - Narrative (Details) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) divestiture | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($)
Income Tax Contingency [Line Items] |  |  |  |  |
Tax expense (benefit) related to operating loss carryback, CARES Act | $ (2.7) | $ (20.7) |  |  |
Capital loss for the tax basis on stock | 187.0 |  |  |  |
Overall capital gain on divestitures | $ 282.3 |  |  |  |
Number of divestitures | divestiture | 3 |  |  |  |
Overall net tax benefit of divestitures | $ 23.4 |  |  |  |
Decrease in valuation allowance | 3.5 |  |  |  |
Unrecognized tax benefits | $ 32.1 | $ 37.6 | $ 23.5 | $ 21.7 | $ 24.9
State and local jurisdictions | California | Earliest tax year |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2017 |  |  |  |
State and local jurisdictions | California | Latest tax years |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2018 |  |  |  |
State and local jurisdictions | New Jersey | Earliest tax year |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2013 |  |  |  |
State and local jurisdictions | New Jersey | Latest tax years |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2017 |  |  |  |
Foreign | Switzerland | Earliest tax year |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2015 |  |  |  |
Foreign | Switzerland | Latest tax years |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Tax year being audited in income tax examination | 2016 |  |  |  |

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