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Stockholder’s Equity - Non-controlling Interest (Details) - Non-controlling Interest - Alclear Holdings LLC - shares
Mar. 31, 2024
Dec. 31, 2023
Class of Stock [Line Items]    
Alclear Units (in shares) 56,405,801  
Ownership Percentage 38.50% 38.51%
Alclear Units held by Alclear post-reorganization members (other than the Co-Founders and Clear Secure, Inc.)    
Class of Stock [Line Items]    
Alclear Units (in shares) 30,609,111  
Ownership Percentage 20.89%  
Alclear Units held by the Co-Founders    
Class of Stock [Line Items]    
Alclear Units (in shares) 25,796,690  
Ownership Percentage 17.61%