Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued incentive compensation	$ 234.5	$ 216.7
Accrued compensation and benefits	64.6	53.5
Lease liability	45.0	43.4
Deferred revenue	79.9	67.4
Reserve for policy cancellations	39.2	29.2
Accrued interest	33.2	15.9
Accrued rent and vendor expenses	14.9	7.6
Other	30.2	22.5
Total	$ 541.5	$ 456.2