Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Balance Sheet Accounts - Schedule of Estimated Fair Value and Principal Amount of Outstanding Debt (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Debt Instrument [Line Items]
Fair Value	$ 262.4		$ 541.9
Principal Amount	265.7		428.1
Term Loan
Debt Instrument [Line Items]
Fair Value	262.4		275.8
Principal Amount	265.7		282.2
2 1/4% Notes
Debt Instrument [Line Items]
Fair Value	0.0		266.1
Principal Amount	$ 0.0		$ 145.9
Convertible Debt \| 2 1/4% Notes
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	2.25%	2.25%		2.25%