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INVESTMENTS IN VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2025
Jun. 30, 2025
May 31, 2025
Apr. 30, 2025
Jul. 31, 2024
Aug. 31, 2022
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Oct. 31, 2025
Dec. 31, 2024
Feb. 28, 2023
Jun. 30, 2022
Apr. 30, 2021
Feb. 28, 2019
Variable Interest Entity [Line Items]                                
Adjustment to additional paid in capital for purchase of noncontrolling interest             $ 233.7                  
Payment for acquisition options                 $ 19.6 $ 16.2            
Loss on impairment             0.0 $ 0.0 47.1 $ 0.0            
Investment in preferred equity securities             167.8   $ 167.8     $ 119.1        
Variable Interest Entity, Primary Beneficiary | Vectorious Medical Technologies                                
Variable Interest Entity [Line Items]                                
Purchase of noncontrolling interests             $ 233.7                  
Ownership percentage   61.00%         100.00%   100.00%              
Noncontrolling interest, equity, carrying amount                         $ 60.4      
Adjustment to additional paid in capital for purchase of noncontrolling interest             $ 173.3                  
Variable Interest Entity, Not Primary Beneficiary | JenaValve Technology, Inc                                
Variable Interest Entity [Line Items]                                
Maximum secured promissory note         $ 75.0                      
Automatic funding extension clause amount         30.0                      
Investee drew additional amount             75.0   $ 75.0     15.0        
Termination loan clause         $ 45.0                      
Variable Interest Entity, Not Primary Beneficiary | JenaValve Technology, Inc | Subsequent Event                                
Variable Interest Entity [Line Items]                                
Investee drew additional amount                     $ 7.5          
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company August 2022 Investment                                
Variable Interest Entity [Line Items]                                
Payment for acquisition options           $ 47.1                    
Loss on impairment   $ 47.1                            
Payments to option to acquire             10.0                  
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company, April 2021 Investment                                
Variable Interest Entity [Line Items]                                
Maximum secured promissory note                             $ 45.0  
Investee drew additional amount             45.0   45.0     45.0        
Payments to option to acquire $ 1.2     $ 1.8                        
Payments for option to acquire investment $ 2.6     $ 4.0                        
Investment in preferred equity securities             45.8   45.8     42.8        
Investment option to acquire             27.5   27.5     20.9        
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company, April 2021 Investment | Subsequent Event                                
Variable Interest Entity [Line Items]                                
Investee drew additional amount                     $ 15.0          
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company December 2021 Investment                                
Variable Interest Entity [Line Items]                                
Maximum secured promissory note                       40.0        
Payments to option to acquire     $ 15.0                          
Payments for option to acquire investment     $ 10.0                          
Investment in preferred equity securities             35.0   35.0     20.0        
Investment option to acquire             40.0   40.0     30.0        
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company February 2019 Investment                                
Variable Interest Entity [Line Items]                                
Maximum secured promissory note   30.0                       $ 47.5    
Investee drew additional amount             77.5   77.5     47.5        
Investment option to acquire             35.0   $ 35.0     $ 35.0       $ 35.0
Option to extend warrant right period, consideration             $ 16.5                  
Variable Interest Entity, Not Primary Beneficiary | Medical Device Company June 2025 Investment                                
Variable Interest Entity [Line Items]                                
Investment in preferred equity securities   $ 30.0