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UNITHOLDERS' CAPITAL - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | Aug. 09, 2018 | May 17, 2018 | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | --- | --- | ---
Class of Stock [Line Items] |  |  |  |
Preferred redemption price (in dollars per share) |  |  | $ 25.00 |
Series A Preferred Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred dividend rate (as percent) |  | 6.625% |  |
Preferred redemption price (in dollars per share) |  | $ 25.00 |  |
Sale of stock, consideration received |  | $ 173.7 |  |
Series A Preferred Units | Preferred Stock Issuance |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares issued during mergers (in shares) |  | 7,200,000 |  |
Series B Preferred Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Preferred dividend rate (as percent) | 6.55% |  |  |
Preferred redemption price (in dollars per share) | $ 25.00 |  |  |
Sale of stock, consideration received | $ 226.9 |  |  |
Series B Preferred Units | Preferred Stock Issuance |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of shares issued during mergers (in shares) | 9,400,000 |  |  |
OCGH |  |  |  |
Class of Stock [Line Items] |  |  |  |
Unitholders' capital (in shares) |  |  | 41,758,979 | 43,822,210
Oaktree Operating Group |  |  |  |
Class of Stock [Line Items] |  |  |  |
Subsidiary units outstanding (in shares) |  |  |  | 160,195,444
Oaktree Operating Group | Converted OCGH Units and OCGH Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Subsidiary units outstanding (in shares) |  |  | 160,591,299 |

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