Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets, Fair Value Disclosure [Abstract]
Gross realized gains on marketable securities and money market accounts	$ 0.4	$ 0.0	$ 0.0
Gross realized loss on marketable securities and money market accounts	0.1	0.4	0.0
Net unrealized holding gains (losses) out of other comprehensive loss and into earnings	0.3	0.4	0.0
Total gains with net gains in other comprehensive income for short-term investments	0.5	0.0	$ 0.0
Fair Value, Recurring | Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Financial assets held in marketable securities	69.2	28.0
Fair Value, Recurring | Fair Value, Inputs, Level 1 | Money Market Funds
Assets, Fair Value Disclosure [Abstract]
Financial assets held in money market accounts	$ 120.6	$ 93.7