v3.23.1
Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Assets        
Restricted cash $ 10.5 $ 11.1    
Non-current restricted cash $ 8.0 7.8 $ 0.0 $ 0.0
$350 million Convertible Bonds        
Liabilities        
Debt instrument, interest rate 3.875%      
Fair Value | Fair Value, Inputs, Level 1        
Assets        
Cash and cash equivalents $ 108.0 34.9    
Restricted cash 2.5 3.3    
Trade receivables 43.0 28.5    
Other current assets (excluding deferred costs) 25.4 16.0    
Due from related parties 65.6 48.6    
Non-current restricted cash 8.0 7.8    
Liabilities        
Trade payables 47.7 34.7    
Accrued expenses 80.8 45.6    
Short-term accrued interest and other items 77.7 15.3    
Other current liabilities 36.2 18.4    
Short-term debt 100.8 0.0    
Long-term debt 1,177.7 1,555.3    
Fair Value | Fair Value, Inputs, Level 2        
Liabilities        
Short-term debt 330.8 0.0    
Long-term debt 0.0 173.3    
Carrying Value        
Assets        
Cash and cash equivalents 108.0 34.9    
Restricted cash 2.5 3.3    
Trade receivables 43.0 28.5    
Other current assets (excluding deferred costs) 25.4 16.0    
Due from related parties 65.6 48.6    
Non-current restricted cash 8.0 7.8    
Liabilities        
Trade payables 47.7 34.7    
Accrued expenses 80.8 45.6    
Short-term accrued interest and other items 77.7 15.3    
Other current liabilities 36.2 18.4    
Carrying Value | Fair Value, Inputs, Level 1        
Liabilities        
Short-term debt 100.8 0.0    
Long-term debt 1,177.7 1,555.3    
Carrying Value | Fair Value, Inputs, Level 2        
Liabilities        
Short-term debt 350.0 0.0    
Long-term debt $ 0.0 $ 350.0