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Income Taxes - Schedule Of Gross Unrecognized Income Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 96.7	$ 78.8	$ 65.4
Increases related to tax positions taken during the current year	40.1	26.5	22.5
Increases related to tax positions taken during a prior year	46.1	1.2	0.0
Decreases related to tax positions taken during a prior year	0.0	0.0	(0.9)
Decreases related to settlements with tax authorities	(0.5)	(3.8)
Decreases related to expiration of statute of limitations	(6.1)	(6.0)	(8.2)
Ending balance	$ 176.3	$ 96.7	$ 78.8

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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Amount of unrecognized tax benefits.

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

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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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 decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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