v3.25.2
STOCKHOLDERS' DEFICIT - Equity statements (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period $ (1,737.8) $ (1,760.5) $ (2,031.0) $ (1,847.9) $ (1,760.5) $ (1,847.9)
Net loss (4.7) (202.1) (32.8) (163.5) (206.8) (196.3)
Other comprehensive income (loss) 11.1 52.7 2.8 (35.4)    
Debt for equity exchange     116.4 14.2    
Taxes paid for restricted unit withholdings   (4.4)   (2.2)    
Share issuance costs       (0.5)    
Share issuances   170.8 243.6      
Stock-based compensation 6.0 5.7 4.4 4.3    
Balance at the end of the period (1,725.4) (1,737.8) (1,696.6) (2,031.0) (1,725.4) (1,696.6)
Additional Paid-in Capital            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period 6,886.1 6,714.2 6,237.7 6,221.9 6,714.2 6,221.9
Debt for equity exchange     116.1 14.2    
Taxes paid for restricted unit withholdings   (4.4)   (2.2)    
Share issuance costs       (0.5)    
Share issuances   170.6 242.9      
Stock-based compensation 6.0 5.7 4.4 4.3    
Balance at the end of the period 6,892.1 6,886.1 6,601.1 6,237.7 6,892.1 6,601.1
Accumulated Other Comprehensive Loss            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period (79.3) (132.0) (113.6) (78.2) (132.0) (78.2)
Other comprehensive income (loss) 11.1 52.7 2.8 (35.4)    
Balance at the end of the period (68.2) (79.3) (110.8) (113.6) (68.2) (110.8)
Accumulated Deficit            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period (8,548.9) (8,346.8) (8,157.7) (7,994.2) (8,346.8) (7,994.2)
Net loss (4.7) (202.1) (32.8) (163.5)    
Balance at the end of the period (8,553.6) (8,548.9) (8,190.5) (8,157.7) (8,553.6) (8,190.5)
Class A common stock | Common Stock            
Increase (Decrease) in Stockholders' Equity            
Balance at the beginning of the period $ 4.3 $ 4.1 $ 2.6 $ 2.6 $ 4.1 $ 2.6
Balance (in shares) 433,143,561 414,417,797 263,604,984 260,574,392 414,417,797 260,574,392
Debt for equity exchange     $ 0.3      
Debt for equity exchange (shares)     25,004,075 2,541,250    
Share issuances   $ 0.2 $ 0.7      
Share issuance (in shares)   17,052,756 72,549,972      
Stock-based compensation (in shares)   1,673,008 195,924 489,342    
Balance at the end of the period $ 4.3 $ 4.3 $ 3.6 $ 2.6 $ 4.3 $ 3.6
Balance (in shares) 433,143,561 433,143,561 361,354,955 263,604,984 433,143,561 361,354,955
Board of Director | Class A common stock            
Increase (Decrease) in Stockholders' Equity            
Shares awarded     195,924   370,586  
Board of Director | Common Stock            
Increase (Decrease) in Stockholders' Equity            
Share issuance (in shares)         370,586  
RSU and PSU Units | Class A common stock            
Increase (Decrease) in Stockholders' Equity            
Shares Vested       489,342 1,302,422