Variable Interest Entities - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 466.1	$ 678.5
Restricted cash	27.3	0.0
Accounts receivable, net	156.4	117.1
Prepaid expenses and other current assets	27.3	13.8
Total current assets	796.5	1,000.6
Total assets	1,744.1	2,127.2
Current liabilities
Accounts payable and accrued expenses	84.1	54.7
Contract liabilities	4.4	5.1	$ 1.4	$ 0.0
Other current liabilities	10.3	7.7
Total current liabilities	490.4	183.1
Total liabilities	923.5	634.3
Company capital	1,182.5	1,101.3
Accumulated deficit	(557.5)	19.7
Total liabilities and stockholders' equity	1,744.1	2,127.2
Variable Interest Entity, Primary Beneficiary
Current assets
Cash and cash equivalents	16.6	10.6
Accounts receivable, net	25.6	14.6
Prepaid expenses and other current assets	0.2	0.0
Total current assets	42.4	25.2
Total assets	42.4	25.2
Current liabilities
Accounts payable and accrued expenses	0.0	3.4
Contract liabilities	0.8	0.0
Other current liabilities	2.0	0.0
Total current liabilities	2.8	3.4
Total liabilities	2.8	3.4
Company capital	59.6	29.3
Accumulated deficit	(20.0)	(7.5)
Total stockholders' equity	39.6	21.8
Total liabilities and stockholders' equity	42.4	$ 25.2
Accountable Care Organizations
Current assets
Restricted cash	27.3
Total current assets	27.3
Total assets	27.3
Current liabilities
Accounts payable and accrued expenses	10.5
Total current liabilities	10.5
Total liabilities	10.5
Company capital	16.7
Accumulated deficit	0.1
Total stockholders' equity	16.8
Total liabilities and stockholders' equity	$ 27.3