Cash Equivalents and Investments - Restricted Cash and Investments (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 923.5	$ 880.1
Total cash, cash equivalents, and restricted cash	941.8	897.7	$ 1,032.8	$ 942.7
Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in Prepaid expenses and other current and other long-term assets	15.9	15.2
Other long-term assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash included in Prepaid expenses and other current and other long-term assets	$ 2.4	$ 2.4