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Income Taxes (Details 3) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Valuation allowance |  |
Unrecognized tax benefits | $ 144.7 | $ 134.0
Portion of unrecognized tax benefits, which if recognized, would be recorded as an income tax benefit | 3.2 |
Long-term deferred tax assets |  |
Valuation allowance |  |
Unrecognized tax benefits | 24.0 | 23.6
Other assets | Foreign tax authority | National Tax Services |  |
Valuation allowance |  |
Unrecognized tax benefits | 117.5 | 109.0
Long-term income taxes payable |  |
Valuation allowance |  |
Unrecognized tax benefits | $ 3.2 | $ 1.9

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