Business Combinations - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended		16 Months Ended
	May 08, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	May 08, 2023
Business Acquisition [Line Items]
BST Acquisition, net of cash acquired				$ 0	$ 141,294,000
Net loss		$ (576,727,000)	$ (36,370,000)	(1,116,416,000)	(36,161,000)
Benefits Science LLC ("BST")
Business Acquisition [Line Items]
Voting equity interest (in percent)	100.00%					100.00%
Purchase price net of cash acquired	$ 160,100,000
BST Acquisition, net of cash acquired	140,900,000
Equity purchase price	19,200,000
Potential cash payments if target revenue achieved, minimum	66,000,000					$ 66,000,000
Potential additional cash payments if maximum target revenue is achieved	$ 16,500,000					16,500,000
Transaction costs		$ 0	$ 6,800,000	$ 0	$ 6,800,000
Benefits Science LLC ("BST") | Increase in amortization of intangible assets
Business Acquisition [Line Items]
Net loss						(3,000,000)
Benefits Science LLC ("BST") | Acquisition-related Costs
Business Acquisition [Line Items]
Net loss						$ (11,300,000)
Benefits Science LLC ("BST") | Minimum
Business Acquisition [Line Items]
Period revenue targets must be met for cash payment	3 years					3 years
Benefits Science LLC ("BST") | Maximum
Business Acquisition [Line Items]
Period revenue targets must be met for cash payment	5 years					5 years