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Subsequent Events - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Jul. 17, 2024
Mar. 21, 2024
Feb. 29, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Subsequent Event [Line Items]              
Sale of stock, percentage of ownership following transaction   56.00%          
Sale of stock, number of shares issued (in shares)   15,409,102          
Sale of stock, consideration received   $ 53.5          
Common stock, par value (in dollars per share)       $ 0.00001 $ 0.00001 $ 0.00001 $ 0.00001
Private Placement              
Subsequent Event [Line Items]              
Sale of stock, number of shares issued (in shares)   3,559,565          
Sale of stock, consideration received   $ 53.5          
Graphite Bio, Inc. Stockholders              
Subsequent Event [Line Items]              
Sale of stock, percentage of ownership following transaction   31.00%          
Subsequent Event              
Subsequent Event [Line Items]              
Pre-merger ownership percentage   65.00%          
Sale of stock, percentage of ownership following transaction   56.00%          
Sale of stock, number of shares issued (in shares) 1,578,947 15,409,184          
Sale of stock, price per share (in dollars per share) $ 19.00            
Sale of stock, consideration received $ 30.0 $ 53.5          
Number of shares of common stock called by warrants (in shares)     95,034        
Proceeds from warrant exercises     $ 0.1        
Common stock, par value (in dollars per share) $ 0.00001            
Subsequent Event | Graphite Bio, Inc. Stockholders              
Subsequent Event [Line Items]              
Pre-merger ownership percentage   35.00%          
Subsequent Event | Graphite Bio, Inc. | Private Placement              
Subsequent Event [Line Items]              
Sale of stock, number of shares issued (in shares)   3,559,565          
Sale of stock, price per share (in dollars per share)   $ 15.03          
Sale of stock, consideration received   $ 53.5          
Subsequent Event | Graphite Bio, Inc. Stockholders              
Subsequent Event [Line Items]              
Sale of stock, percentage of ownership following transaction   31.00%