Cash, Cash Equivalents, and Marketable Debt Securities - Schedule of Marketable Debt Securities in Continuous Loss Position (Details) $ in Millions	Jun. 30, 2023 USD ($) Security	Dec. 31, 2022 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months	$ 96.5	$ 94.7
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security	117	132
Unrealized Losses Less Than 12 Months	$ 0.8	$ 1.2
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer	$ 45.7	$ 48.5
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security	61	66
Unrealized Losses 12 Months Or Longer	$ 1.1	$ 1.4
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months	$ 62.9	$ 77.0
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security	76	113
Unrealized Losses Less Than 12 Months	$ 0.5	$ 1.0
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer	$ 35.9	$ 37.9
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security	48	50
Unrealized Losses 12 Months Or Longer	$ 0.9	$ 1.1
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months	$ 20.6	$ 14.5
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security	20	14
Unrealized Losses Less Than 12 Months	$ 0.2	$ 0.2
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer	$ 9.0	$ 9.3
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security	12	13
Unrealized Losses 12 Months Or Longer	$ 0.2	$ 0.3
U.S. Government Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months	$ 10.9	$ 3.2
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security	18	5
Unrealized Losses Less Than 12 Months	$ 0.1	$ 0.0
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer	$ 0.8	$ 1.3
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security	1	3
Unrealized Losses 12 Months Or Longer	$ 0.0	$ 0.0
Certificates of Deposit
Schedule Of Available For Sale Securities [Line Items]
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months	$ 2.1
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security	3
Unrealized Losses Less Than 12 Months	$ 0.0
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer	$ 0.0
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security	0
Unrealized Losses 12 Months Or Longer	$ 0.0