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Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($)
Accounting Policies [Abstract] |
Total amount of unrecognized tax benefits relating to uncertain tax positions | $ 35.9
Increase in the total amount of unrecognized tax benefits relating to uncertain tax positions | 2.7
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months | $ 13.6

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