Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions	6 Months Ended
Jun. 30, 2021 USD ($)
Accounting Policies [Abstract]
Total amount of unrecognized tax benefits relating to uncertain tax positions	$ 39.1
Increase in the total amount of unrecognized tax benefits relating to uncertain tax positions	5.9
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months	13.3
Increase in reserves for uncertain tax positions expected to be taken in current year	3.5
Increase in reserves from uncertain tax positions from changes in prior year positions	$ 2.4

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of unrecognized tax benefits.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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