Summary of Significant Accounting Policies - Additional Information (Details) shares in Millions		1 Months Ended	12 Months Ended
	Oct. 01, 2022 USD ($)	Oct. 31, 2023 shares	Dec. 31, 2023 USD ($) ReportingUnit	Dec. 31, 2022 USD ($) ReportingUnit	Dec. 31, 2021 USD ($) ReportingUnit
Accounting Policies [Line Items]
Equity investment impairment loss			$ 4,000,000
Equity investments included in other assets			$ 15,000,000	$ 19,000,000
Number of reporting unit tested for goodwill impairment | ReportingUnit			1	1	1
Goodwill impairment			$ 0	$ 0	$ 0
Noncancellable operating lease renewal option period			10 years
Operating lease right-of-use assets, net			$ 29,929,000	35,906,000	20,200,000
Sales and marketing			341,328,000	357,631,000	370,217,000
Fair value of debt				649,600,000
Advertising costs			$ 198,800,000	226,300,000	296,600,000
Common Class B
Accounting Policies [Line Items]
Shares issued in period (in shares) | shares		7.6
Restricted Stock Units ("RSUs") Performance-Vesting Founders Awards | Common Class B
Accounting Policies [Line Items]
Remaining shares not issued until three years from vesting date (in shares) | shares		15.7
Minority Equity Interests
Accounting Policies [Line Items]
Equity method investment, ownership percentage			20.00%
Prescription transactions revenue
Accounting Policies [Line Items]
Selling expense			$ 8,800,000	0	$ 0
Sales and marketing			$ 27,300,000	24,700,000
Capitalized Software Costs
Accounting Policies [Line Items]
Finite-lived intangible asset, useful life			3 years
Furniture and fixtures
Accounting Policies [Line Items]
Useful life of assets			5 years
Computer equipment
Accounting Policies [Line Items]
Useful life of assets			3 years
Operating Lease Right Of Use Assets | General and administrative
Accounting Policies [Line Items]
Impairment loss	$ 11,300,000
Money Market Funds | Fair Value, Inputs, Level 1
Accounting Policies [Line Items]
Cash equivalents, fair value disclosure			$ 605,500,000	$ 642,500,000
Customer Concentration Risk | Revenue From Customer | Customer One
Accounting Policies [Line Items]
Concentration risk percentage			13.00%		13.00%
Customer Concentration Risk | Revenue From Customer | Customer Two
Accounting Policies [Line Items]
Concentration risk percentage					11.00%
Customer Concentration Risk | Accounts Receivable | Customer One
Accounting Policies [Line Items]
Concentration risk percentage			10.00%
Credit Concentration Risk | Accounts Receivable | Customer One
Accounting Policies [Line Items]
Concentration risk percentage				13.00%