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Commitments and Contingencies - Lease Cost, Cash Flows and Other Supplemental Information - Operating Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 14.0	$ 14.0
Sublease income	(1.5)	(0.7)
Total operating lease cost	12.5	13.3
Cash paid for amounts included in the measurement of operating lease liabilities	$ 16.0	$ 11.3
Weighted-average remaining lease term	11 years 9 months 18 days	12 years 3 months 18 days
Weighted-average discount rate	4.10%	4.20%

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Amount of lease cost recognized by lessee for lease contract.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of sublease income excluding finance and operating lease expense.

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