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Stockholders' Deficit (Q3) (Details)
 9 Months Ended 10 Months Ended 12 Months Ended
Sep. 30, 2023
Vote
$ / shares
shares
Dec. 31, 2021
Vote
$ / shares
shares
Dec. 31, 2022
$ / shares
shares
Apr. 25, 2023
shares
Stockholders' Equity [Abstract]        
Preference shares, shares authorized (in shares) 1,000,000 1,000,000 1,000,000  
Preference shares, par value (in dollars per share) | $ / shares $ 0.0001 $ 0.0001 $ 0.0001  
Preference shares, shares issued (in shares) 0 0 0  
Preference shares, shares outstanding (in shares) 0 0 0  
Stock conversion basis of Class B to Class A Ordinary shares at time of initial Business Combination 1   1  
As-converted percentage for Class A ordinary shares after conversion of Class B shares 20.00%   20.00%  
Class A Common Stock [Member]        
Stockholders' Equity [Abstract]        
Ordinary shares, shares authorized (in shares) 500,000,000 500,000,000 500,000,000  
Ordinary shares, par value (in dollars per share) | $ / shares $ 0.0001 $ 0.0001 $ 0.0001  
Number of votes per share | Vote 1 1    
Ordinary shares, shares issued (in shares) 0 0 0  
Ordinary shares, shares outstanding (in shares) 0 0 0  
Common stock subject to possible redemption (in shares) 5,702,791 23,000,000 23,000,000 17,297,209
Class B Common Stock [Member]        
Stockholders' Equity [Abstract]        
Ordinary shares, shares authorized (in shares) 50,000,000 50,000,000 50,000,000  
Ordinary shares, par value (in dollars per share) | $ / shares $ 0.0001 $ 0.0001 $ 0.0001  
Number of votes per share | Vote 1 1    
Ordinary shares, shares issued (in shares) 5,750,000 5,750,000 5,750,000  
Ordinary shares, shares outstanding (in shares) 5,750,000 5,750,000 5,750,000