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Stockholder's Deficit (FY) (Details) |  |  |  | 9 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 12, 2023 | Oct. 06, 2021 USD ($) shares | Mar. 15, 2021 USD ($) shares | Sep. 30, 2023 USD ($) Vote $ / shares shares | Dec. 31, 2021 USD ($) Vote $ / shares shares | Dec. 31, 2022 USD ($) $ / 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 |
Proceeds from issuance of ordinary share | $ |  |  |  |  | $ 25,000 | $ 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% |
Sponsor [Member] |  |  |  |  |  |  |
Stockholders' Equity [Abstract] |  |  |  |  |  |  |
Stock conversion basis of Class B to Class A Ordinary shares at time of initial Business Combination | 1 |  |  |  |  |  |
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 |
Class B Common Stock [Member] | Sponsor [Member] | Founder Shares [Member] |  |  |  |  |  |  |
Stockholders' Equity [Abstract] |  |  |  |  |  |  |
Ordinary shares, shares outstanding (in shares) |  | 5,750,000 |  |  |  |  |
Proceeds from issuance of ordinary share | $ |  |  | $ 25,000 | $ 25,000 |  |  |
Shares issued (in shares) |  |  | 7,187,500 | 5,750,000 |  |  |
Ownership interest, as converted percentage |  |  | 20.00% |  |  |  |
Number of shares surrender for no consideration (in shares) |  | 1,437,500 |  |  |  |  |
Shares surrendered, consideration | $ |  | $ 0 |  |  |  |  |
Stock conversion basis of Class B to Class A Ordinary shares at time of initial Business Combination |  |  |  | 1 |  | 1 |

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