Redeemable Convertible Preferred Stock and Stockholders’ Equity - Narrative (Details)	1 Months Ended		3 Months Ended				5 Months Ended	9 Months Ended
	Aug. 31, 2021 USD ($) vote shares	May 31, 2021 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) shares	Dec. 31, 2020 USD ($) $ / shares shares
Temporary Equity [Line Items]
Common stock shares authorized			1,050,000,000					1,050,000,000		150,000,000
Common stock par value (in dollars per share) | $ / shares			$ 0.0001					$ 0.0001		$ 0.0001
Aggregate preferential amount | $										$ 510,500,000
Conversion ratio			1					1
Total stock-based compensation expense | $	$ 6,800,000		$ 64,332,000			$ 42,377,000		$ 76,002,000	$ 43,749,000
Shares repurchased | $				$ 1,305,000	$ 5,274,000
Proceeds from stock issued | $		$ 700,000
Proceeds from tax withholding | $		$ 2,500,000
Stock repurchased (in shares)							329,601		0
Non-cash charitable contribution | $			$ 7,800,000					7,757,000	$ 0
Addition Two, L.P.
Temporary Equity [Line Items]
Shares tendered		838,267
Shares repurchased | $		$ 20,600,000
Warby Parker
Temporary Equity [Line Items]
Shares tendered		838,267
Shares repurchased | $		$ 20,600,000
Tender Offer
Temporary Equity [Line Items]
Share authorized for repurchase | $		$ 100,000,000
Share authorized for repurchase, price per share (in dollars per share) | $ / shares		$ 24.5306
Shares tendered		1,676,534
Total consideration | $		$ 41,100,000
Total stock-based compensation expense | $		$ 9,200,000						$ 9,200,000
Series A common stock
Temporary Equity [Line Items]
Common stock shares authorized	750,000,000		750,000,000					750,000,000		135,000,000
Common stock par value (in dollars per share) | $ / shares										$ 0.0001
Number of votes granted | vote	1
Stock repurchased (in shares)							63,821
Stock issued (in shares)	178,572
Stock authorized (in shares)	1,071,432
Series A common stock | Tender Offer
Temporary Equity [Line Items]
Shares tendered		335,847
Series B common stock
Temporary Equity [Line Items]
Common stock shares authorized	150,000,000		150,000,000					150,000,000		15,000,000
Common stock par value (in dollars per share) | $ / shares										$ 0.0001
Number of votes granted | vote	10
Series B common stock | Tender Offer
Temporary Equity [Line Items]
Shares tendered		387,163
Series C common stock
Temporary Equity [Line Items]
Common stock shares authorized	150,000,000		150,000,000					150,000,000
Common stock par value (in dollars per share) | $ / shares										$ 0.0001
Number of votes granted | vote	0
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Preferred stock shares authorized	50,000,000
Excess of preferred stock repurchase price over carrying value | $							$ 5,000,000
Common Stock
Temporary Equity [Line Items]
Excess of preferred stock repurchase price over carrying value | $							$ 1,600,000
Series A Preferred Stock | Tender Offer
Temporary Equity [Line Items]
Shares tendered		54,484
Series AA Preferred
Temporary Equity [Line Items]
Stock repurchased (in shares)							160,136
Series AA Preferred | Tender Offer
Temporary Equity [Line Items]
Shares tendered		293,920
Series B Preferred Stock | Tender Offer
Temporary Equity [Line Items]
Shares tendered		3,752
Series D Preferred
Temporary Equity [Line Items]
Stock repurchased (in shares)							60,137
Series D Preferred | Tender Offer
Temporary Equity [Line Items]
Shares tendered		601,368