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Summary of Significant Accounting Policies - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
Segment
Lease
Dec. 31, 2022
USD ($)
Summary Of Significant Accounting Policies [Line Items]    
Number of operating segment | Segment 1  
Number of reportable segment | Segment 1  
Advertising expense $ 104 $ 195
Restricted cash $ 0  
Percentage of concentrations of risk, cash and cash equivalents 49.00% 24.00%
Number of finance leases outstanding | Lease 0  
Unrestricted cash, cash equivalents, and marketable securities $ 382  
Accumulated loss $ (3,246) $ (2,929)
Percentage of merchants payable amount denominated in RMB 58.00% 70.00%
Net gain (losses) resulting from foreign exchange transactions $ (1) $ 10
Cumulative translation gain (loss) $ (2) $ (7)
Foreign Exchange Forward Contracts    
Summary Of Significant Accounting Policies [Line Items]    
Derivative contract term 12 months  
Minimum    
Summary Of Significant Accounting Policies [Line Items]    
Original maturities of marketable securities 90 days  
Minimum | Restricted Stock Units (RSUs) and Stock Options    
Summary Of Significant Accounting Policies [Line Items]    
Award requisite service period 1 year  
Maximum | Restricted Stock Units (RSUs) and Stock Options    
Summary Of Significant Accounting Policies [Line Items]    
Award requisite service period 4 years  
United States    
Summary Of Significant Accounting Policies [Line Items]    
Percentage of cash and cash equivalents 28.00% 72.00%