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Debt, net - Schedule of Debt (Tables) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2020
Sep. 30, 2019
Debt Instrument [Line Items]    
Debt $ 640.6 $ 460.5
Long-term Line of Credit $ 0.0 0.0
Schedule of Long-term Debt Instruments
The Company's notes payable at their carrying amounts consist of the following:
June 30,
2020
September 30,
2019
(In millions)
Unsecured:
3.75% convertible senior notes due 2020
$—  $116.7  
8.0% senior notes due 2024 (1)
344.8  343.8  
5.0% senior notes due 2028 (1)
295.8  —  
Revolving credit facility—  —  
$640.6  $460.5  
 
3.75% convertible senior notes due 2020, net of discount    
Debt Instrument [Line Items]    
Debt $ 0.0 116.7
Interest rate percentage 3.75%  
Senior Notes 8.0%    
Debt Instrument [Line Items]    
Debt $ 344.8 343.8
Interest rate percentage 8.00%  
Senior Notes 5.0%    
Debt Instrument [Line Items]    
Debt $ 295.8 $ 0.0
Interest rate percentage 5.00%