Description of Business and Summary of Significant Accounting Policies - Narrative (Details)			3 Months Ended	12 Months Ended
	Mar. 02, 2022 numberOfReportableSegment	Mar. 15, 2021 USD ($) $ / shares shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) numberOfReportableSegment numberOfOperatingSegment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Inventory and fixed asset losses due to fulfillment center fire				$ 284,825,000	$ 0	$ 0
Number of operating segments | numberOfOperatingSegment				1
Number of reportable segments | numberOfReportableSegment				1
Accounts receivable, net				$ 90,000,000	12,000,000
Goodwill impairment				0	0	0
Goodwill from immaterial acquisitions				9,739,000	4,247,000
Impairment losses of long-lived assets, including intangible assets				$ 0	0	0
Expiration period, discount coupons and loyalty rewards				6 months
Estimated redemption period, discount coupons and loyalty rewards				6 months
Advertising expenses				$ 433,000,000	$ 128,000,000	$ 252,000,000
Subsequent event
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Number of reportable segments | numberOfReportableSegment	2
Series of Individually Immaterial Business Acquisitions
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Goodwill from immaterial acquisitions				6,000,000
Fire
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Increase in net loss due to fulfillment center fire				$ 296,000,000
Fire | Cost of sales
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Inventory and fixed asset losses due to fulfillment center fire			$ 158,000,000
Fire | Operating, general and administrative
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Inventory and fixed asset losses due to fulfillment center fire			127,000,000
Liability for catastrophe claims			$ 11,000,000
Options
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Vesting period				4 years
Cash and Cash Equivalents | Financial Institutions | Three Financial Institutions
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Concentration risk (in percentage)				77.00%
Cash and Cash Equivalents | Financial Institutions | Five Financial Institutions
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Concentration risk (in percentage)					89.00%
Accounts Receivable | Customer Concentration Risk | Four Payment Processing Companies
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Concentration risk (in percentage)				14.00%
Accounts Receivable | Customer Concentration Risk | Six Payment Processing Companies
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Concentration risk (in percentage)					56.00%
Common Class A
Basis of Presentation of Summary of Significant Accounting Policies [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares		100,000,000
Sale of stock, price per share (in usd per share) | $ / shares		$ 35.00
Proceeds from sale of stock, net		$ 3,400,000,000
Payments for underwriting discounts		$ 69,000,000