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Commitments and Contingencies (FY) (Details)
 9 Months Ended 10 Months Ended 12 Months Ended
Nov. 01, 2021
USD ($)
$ / shares
Sep. 30, 2023
USD ($)
Demand
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Demand
$ / shares
Underwriting Agreement [Abstract]        
Payments for underwriting expense $ 4,000,000   $ 4,000,000 $ 0
Payments for underwriting expense per unit (in dollars per share) | $ / shares $ 0.17      
Deferred underwriting fee per unit (in dollars per share) | $ / shares       $ 0.376
Deferred underwriting fees $ 8,650,000 $ 0   $ 8,650,000
Marketing Fee Agreement [Abstract]        
Advisory fee   150,000   150,000
Minimum [Member]        
Marketing Fee Agreement [Abstract]        
Payment to advisors upon close   $ 2,000,000   $ 2,000,000
Maximum [Member]        
Registration and Stockholder Rights [Abstract]        
Number of demands eligible security holder can make | Demand   3   3
Marketing Fee Agreement [Abstract]        
Payment to advisors upon close   $ 6,000,000   $ 6,000,000