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Debt and Credit Arrangements (Tables)
 9 Months Ended
Sep. 30, 2019
Debt Instrument  
Summary of Outstanding Borrowings
The following table represents the components of our borrowings:
 
September 30,
2019
 
December 31,
2018
Senior secured revolving credit facilities and term loan:
 
 
 
Term loan due November 2024 (1)
$
450.0

 
$
—

Senior secured revolving credit facility due November 2024
149.8

 
—

Senior secured revolving credit facility due November 2022
—

 
329.3

Unamortized debt issuance costs
(5.8
)
 
—

Senior secured revolving credit facilities and term loan, net of debt issuance costs
594.0

 
329.3

 
 
 
 
Convertible notes due November 2024:
 
 
 
Principal amount
$
258.8

 
$
258.8

Unamortized discount
(44.7
)
 
(50.4
)
Unamortized debt issuance costs
(4.0
)
 
(4.5
)
Convertible notes due November 2024, net of unamortized discount and debt issuance costs
210.1

 
203.9

 
 
 
 
Foreign facilities
4.3

 
11.2

 
 
 
 
Total debt, net of unamortized discount and debt issuance costs
808.4

 
544.4

Less: current maturities
(15.9
)
 
(11.2
)
Long-term debt
$
792.5

 
$
533.2


_______________
(1) 
The term loan was drawn on July 1, 2019 in conjunction with the acquisition of AXC. See below for more information.
Schedule of Interest Expense and Financing Cost Amortization
The following table summarizes interest expense and financing costs amortization related to the 2019 Credit Facilities and our previous senior secured revolving credit facility:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
Interest expense, term loan due November 2024
$
4.6

 
$
—

 
$
4.6

 
$
—

Interest expense, senior secured revolving credit facilities
1.0

 
2.9

 
6.8

 
8.0

Interest expense, senior secured revolving credit facilities and term loan
$
5.6

 
$
2.9

 
$
11.4

 
$
8.0

 
 
 
 
 
 
 
 
Financing costs amortization, senior secured revolving credit facilities and term loan
$
0.8

 
$
0.1

 
$
1.2

 
$
0.4
Convertible Notes, due 2024  
Debt Instrument  
Schedule of Interest Accretion
The following table summarizes interest accretion of the 2024 Notes discount, 1.0% contractual interest coupon and financing costs amortization associated with the 2024 Notes:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
2024 Notes, interest accretion of convertible notes discount
$
2.0

 
$
1.9

 
$
5.7

 
$
5.4

2024 Notes, 1.0% contractual interest coupon
0.6

 
0.6

 
1.9

 
1.9

2024 Notes, total interest expense
$
2.6

 
$
2.5

 
$
7.6

 
$
7.3

 
 
 
 
 
 
 
 
2024 Notes, financing costs amortization
$
0.2

 
$
0.2

 
$
0.5

 
$
0.5
Convertible Notes, Due 2018  
Debt Instrument  
Schedule of Interest Accretion
The following table summarizes interest accretion of the 2018 Notes discount, 2.00% contractual interest coupon, and financing costs amortization associated with the 2018 Notes:
 
Three Months Ended September 30, 2018
 
Nine Months Ended September 30, 2018
2018 Notes, interest accretion of convertible notes discount
$
0.4

 
$
1.9

2018 Notes, 2.0% contractual interest coupon
0.1

 
1.0

2018 Notes, total interest expense
$
0.5

 
$
2.9