v3.20.1
STOCKHOLDERS' EQUITY - equity statements (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Sep. 14, 2018
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   $ 1,214.2 $ 1,397.6  
Cumulative Effect of New Accounting Principle in Period of Adoption     78.8 $ (16.9)
Net loss   (2,176.3) (130.2)  
Other comprehensive income (loss)   (93.5) (24.9)  
RSUs surrendered to pay for payroll taxes   (1.0) (1.1)  
Reclassification from temporary equity     0.4  
Stock-based compensation   2.7 4.0  
Balance at the end of the period   (1,074.0) 1,303.5  
Additional Paid-in Capital        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   2,001.9 1,998.4  
RSUs surrendered to pay for payroll taxes   (1.0) (1.1)  
Reclassification from temporary equity     0.4  
Stock-based compensation   2.7 4.0  
Balance at the end of the period   2,003.6 2,001.7  
Treasury Stock        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   $ (56.4) $ (56.4)  
Balance (in shares)   3,732,625 3,732,625  
Balance at the end of the period   $ (56.4) $ (56.4)  
Balance (in shares)   3,732,625 3,732,625  
Accumulated Other Comprehensive Loss        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   $ (26.1) $ 5.5  
Other comprehensive income (loss)   (93.5) (24.9)  
Balance at the end of the period   (119.6) (19.4)  
Accumulated Earnings (Deficit)        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   (706.2) (550.9)  
Cumulative Effect of New Accounting Principle in Period of Adoption     78.8 $ (16.9)
Net loss   (2,176.3) (130.2)  
Balance at the end of the period   (2,902.6) $ (623.4)  
Class A common stock        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   $ 0.5    
Balance (in shares)   52,080,077    
Balance at the end of the period   $ 0.5    
Balance (in shares)   52,549,593    
Dividends   $ 0.20 $ 0.20  
Class A common stock | Dividend declared        
Increase (Decrease) in Stockholders' Equity        
Dividends declared   $ (1.6) $ (10.7)  
Class A common stock | Common Stock        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period     $ 0.5  
Balance (in shares)   52,080,077 55,401,325  
Reclassification from temporary equity (in shares)     75,712  
Stock based compensation (in shares)   469,516 328,904  
Balance at the end of the period     $ 0.5  
Balance (in shares)   52,549,593 55,805,941  
Class A common stock | Accumulated Earnings (Deficit) | Dividend declared        
Increase (Decrease) in Stockholders' Equity        
Dividends declared   $ (1.6) $ (10.7)  
Class B common stock        
Increase (Decrease) in Stockholders' Equity        
Balance (in shares)   51,769,784    
Common stock repurchase and cancellation $ (421.0)      
Common stock repurchased and cancellation (in shares) 24,057,143      
Balance (in shares)   51,769,784    
Dividends   $ 0.20 $ 0.20  
Class B common stock | Dividend declared        
Increase (Decrease) in Stockholders' Equity        
Dividends declared   $ (1.6) $ (10.4)  
Class B common stock | Common Stock        
Increase (Decrease) in Stockholders' Equity        
Balance at the beginning of the period   $ 0.5 $ 0.5  
Balance (in shares)   51,769,784 51,769,784  
Balance at the end of the period   $ 0.5 $ 0.5  
Balance (in shares)   51,769,784 51,769,784  
Class B common stock | Accumulated Earnings (Deficit) | Dividend declared        
Increase (Decrease) in Stockholders' Equity        
Dividends declared   $ (1.6) $ (10.4)