Summary of Significant Accounting Policies - Income Taxes (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Accounting Policies [Abstract]
Total amount of unrecognized tax benefits relating to uncertain tax positions	$ 40.3
Decrease in the total amount of unrecognized tax benefits relating to uncertain tax positions	(0.6)
Decrease resulted primarily from a favorable settlements related to certain non-U.S. income tax obligations of an acquired business and the expiration of U.S. state income tax statutes	1.7
Increase in reserves for uncertain tax positions expected to be taken in current year	1.1
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months	$ 6.8

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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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