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Debt (Tables)
12 Months Ended
Sep. 30, 2019
Debt Disclosure [Abstract]  
Debt
The Company's notes payable at their principal amounts, net of unamortized discounts and debt issuance costs, consist of the following:
 
September 30,
 
2019
 
2018
 
(In millions)
Unsecured:
 
 
 
3.75% convertible senior notes due 2020
$
116.7

 
$
111.7

8.0% senior notes due 2024
343.8

 

Revolving credit facility

 

 
$
460.5

 
$
111.7