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Debt and Credit Facility (Tables)
6 Months Ended
Sep. 30, 2019
Debt Disclosure [Abstract]  
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
The following table shows the carrying amounts and fair values of the Company's senior and junior subordinated convertible debt, senior secured notes, and term loan facility as of September 30, 2019 and March 31, 2019 (in millions).

 
September 30,
 
March 31,
 
2019
 
2019
 
Carrying Amount (1)
 
Fair Value
 
Carrying Amount (1)
 
Fair Value
2023 Senior Secured Notes
$
987.1

 
$
1,055.0

 
$
985.4

 
$
1,020.1

2021 Senior Secured Notes
$
990.2

 
$
1,022.5

 
$
987.4

 
$
1,008.1

Term Loan Facility
$
1,707.5

 
$
1,723.5

 
$
1,892.1

 
$
1,911.5

2017 Senior Convertible Debt
$
1,522.8

 
$
2,666.5

 
$
1,493.6

 
$
2,285.4

2015 Senior Convertible Debt
$
1,387.3

 
$
3,270.2

 
$
1,360.8

 
$
2,810.6

2017 Junior Convertible Debt
$
340.8

 
$
888.6

 
$
335.9

 
$
740.8


(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 14 Debt and Credit Facility for further information).

Debt obligations included in the condensed consolidated balance sheets consisted of the following (in millions):
 
 
Coupon Interest Rate
 
Effective Interest Rate
 
Fair Value of Liability Component at Issuance (1)
 
September 30, 2019
 
March 31, 2019
 
 
 
 
 
 
Senior Secured Indebtedness
 
 
 
 
 
 
 
 
 
 
Revolving Credit Facility
 
 
 
 
 
 
 
$
2,881.5

 
$
3,266.5

Term Loan Facility
 
 
 
 
 
 
 
1,723.5

 
1,911.5

2023 Notes, maturing June 1, 2023 ("2023 Notes")
 
4.333%
 
4.7%
 
 
 
1,000.0

 
1,000.0

2021 Notes, maturing June 1, 2021 ("2021 Notes")
 
3.922%
 
4.5%
 
 
 
1,000.0

 
1,000.0

Total Senior Secured Indebtedness
 
 
 
 
 
 
 
6,605.0

 
7,178.0

Senior Subordinated Convertible Debt - Principal Outstanding
 
 
 
 
2017 Senior Convertible Debt, maturing February 15, 2027 ("2017 Senior Convertible Debt")
 
1.625%
 
6.0%
 
$1,396.3
 
2,070.0

 
2,070.0

2015 Senior Convertible Debt, maturing February 15, 2025 ("2015 Senior Convertible Debt")
 
1.625%
 
5.9%
 
$1,160.1
 
1,725.0

 
1,725.0

Junior Subordinated Convertible Debt - Principal Outstanding
 
 
 
 
2017 Junior Convertible Debt, maturing February 15, 2037 ("2017 Junior Convertible Debt")
 
2.250%
 
7.4%
 
$321.1
 
686.3

 
686.3

Total Convertible Debt
 
 
 
 
 
 
 
4,481.3

 
4,481.3

 
 
 
 
 
 
 
 
 
 
 
Gross long-term debt including current maturities
 
 
 
 
 
 
 
11,086.3

 
11,659.3

Less: Debt discount (2)
 
 
 
 
 
 
 
(1,208.6
)
 
(1,268.7
)
Less: Debt issuance costs (3)
 
 
 
 
 
 
 
(75.1
)
 
(83.6
)
Net long-term debt including current maturities
 
 
 
 
 
 
 
9,802.6

 
10,307.0

Less: Current maturities (4)
 
 
 
 
 
 
 
(1,387.3
)
 
(1,360.8
)
Net long-term debt
 
 
 
 
 
 
 
$
8,415.3

 
$
8,946.2

 
 
 
 
 
 
 
 
 
 
 

(1) As each of the convertible debt instruments may be settled in cash upon conversion, for accounting purposes, they were bifurcated into a liability component and an equity component, which are both initially recorded at fair value.  The amount allocated to the equity component is the difference between the principal value of the instrument and the fair value of the liability component at issuance.  The resulting debt discount is being amortized to interest expense at the respective effective interest rate over the contractual term of the debt.

(2) The unamortized discount consists of the following (in millions):  
 
September 30,
 
March 31,
 
2019
2019
2023 Notes
$
(4.0
)
 
$
(4.4
)
2021 Notes
(3.0
)
 
(3.8
)
2017 Senior Convertible Debt
(533.4
)
 
(561.9
)
2015 Senior Convertible Debt
(325.8
)
 
(351.4
)
2017 Junior Convertible Debt
(342.4
)
 
(347.2
)
Total unamortized discount
$
(1,208.6
)
 
$
(1,268.7
)

(3) Debt issuance costs consist of the following (in millions):
 
September 30,
 
March 31,
 
2019
2019
Revolving Credit Facility
$
(14.6
)
 
$
(14.7
)
Term Loan Facility
(16.0
)
 
(19.4
)
2023 Notes
(8.9
)
 
(10.2
)
2021 Notes
(6.8
)
 
(8.8
)
2017 Senior Convertible Debt
(13.8
)
 
(14.5
)
2015 Senior Convertible Debt
(11.9
)
 
(12.8
)
2017 Junior Convertible Debt
(3.1
)
 
(3.2
)
Total debt issuance costs
$
(75.1
)
 
$
(83.6
)


(4) Current maturities consist of the liability component of the 2015 Senior Convertible Debt as the debentures were convertible as of September 30, 2019 and March 31, 2019
Schedule of Maturities of Long-term Debt
Expected maturities relating to the Company’s long-term debt as of September 30, 2019 are as follows (in millions):

Fiscal year ending March 31,
 
Expected Maturities
 2020
 
$

 2021
 

 2022
 
1,000.0

 2023
 

 2024
 
3,881.5

Thereafter
 
6,204.8

Total
 
$
11,086.3


Convertible Debt <div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The following table sets forth the applicable Conversion Rates adjusted for dividends declared since issuance of such series of Convertible Debt and the applicable Incremental Share Factors and Maximum Conversion Rates as adjusted for dividends paid since the applicable issuance date:</font></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:center;padding-left:0px;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.80506822612085%;border-collapse:collapse;text-align:left;"><tr><td colspan="13" rowspan="1"></td></tr><tr><td style="width:33%;" rowspan="1" colspan="1"></td><td style="width:15%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:14%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:15%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:15%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="12" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Dividend adjusted rates as of September 30, 2019</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Conversion Rate</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Approximate Conversion Price</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Incremental Share Factor</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Maximum Conversion Rate</font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2017 Senior Convertible&#160;Debt </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10.3801</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">96.34</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5.1900</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">14.7916</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2015 Senior Convertible Debt </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">16.1870</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">61.78</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">8.0935</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">22.6617</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">2017 Junior Convertible Debt </font><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1)</sup></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10.5654</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">$</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">94.65</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">5.2828</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">&#160;</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">14.7916</font></div></td><td style="vertical-align:bottom;background-color:#cceeff;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><sup style="vertical-align:top;line-height:120%;font-size:7pt">(1) </sup></font><font style="font-family:inherit;font-size:10pt;">As of </font><font style="font-family:inherit;font-size:10pt;">September&#160;30, 2019</font><font style="font-family:inherit;font-size:10pt;">, the 2017 Senior Convertible Debt and the 2017 Junior Convertible Debt were not convertible. As of </font><font style="font-family:inherit;font-size:10pt;">September&#160;30, 2019</font><font style="font-family:inherit;font-size:10pt;">, the holders of the </font><font style="font-family:Times New Roman;font-size:10pt;">2015 Senior </font><font style="font-family:Times New Roman;font-size:10pt;">Convertible </font><font style="font-family:Times New Roman;font-size:10pt;">Debt</font><font style="font-family:inherit;font-size:10pt;"> have the right to convert their debentures between </font><font style="font-family:inherit;font-size:10pt;">October 1, 2019</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">December&#160;31, 2019</font><font style="font-family:inherit;font-size:10pt;"> because the Company's common stock price has exceeded the Conversion Price by </font><font style="font-family:inherit;font-size:10pt;">130%</font><font style="font-family:inherit;font-size:10pt;"> for the specified period of time during the quarter ended </font><font style="font-family:inherit;font-size:10pt;">September&#160;30, 2019</font><font style="font-family:inherit;font-size:10pt;">. If a holder of </font><font style="font-family:Times New Roman;font-size:10pt;">2015 Senior </font><font style="font-family:Times New Roman;font-size:10pt;">Convertible </font><font style="font-family:Times New Roman;font-size:10pt;">Debt</font><font style="font-family:inherit;font-size:10pt;"> were to convert their debentures on </font><font style="font-family:inherit;font-size:10pt;">October 1, 2019</font><font style="font-family:inherit;font-size:10pt;">, the adjusted Conversion Rate would be increased to </font><font style="font-family:inherit;font-size:10pt;">18.7147</font><font style="font-family:inherit;font-size:10pt;"> to include an additional maximum incremental share rate per the terms of the indenture. As of </font><font style="font-family:inherit;font-size:10pt;">September&#160;30, 2019</font><font style="font-family:inherit;font-size:10pt;">, the </font><font style="font-family:Times New Roman;font-size:10pt;">2015 Senior </font><font style="font-family:Times New Roman;font-size:10pt;">Convertible </font><font style="font-family:Times New Roman;font-size:10pt;">Debt</font><font style="font-family:inherit;font-size:10pt;"> had a value if converted above par of </font><font style="font-family:inherit;font-size:10pt;">$1.30 billion</font><font style="font-family:inherit;font-size:10pt;">.</font></div></div>
Schedule of Interest Expense
Interest expense consists of the following (in millions):
 
Three Months Ended
September 30,
 
Six Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
Debt issuance amortization
$
3.3

 
$
3.8

 
$
6.6

 
$
5.7

Debt discount amortization
0.7

 
0.7

 
1.4

 
0.9

Interest expense
74.9

 
85.7

 
153.6

 
125.9

Total interest expense on Senior Secured Indebtedness
78.9

 
90.2

 
161.6

 
132.5

Debt issuance amortization
1.0

 
0.9

 
1.9

 
1.8

Debt discount amortization
29.6

 
27.9

 
58.8

 
55.4

Coupon interest expense
19.3

 
19.3

 
38.6

 
38.6

Total interest expense on Convertible Debt
49.9

 
48.1

 
99.3

 
95.8

Other interest expense
0.8

 
0.3

 
1.3

 
0.7

Total interest expense
$
129.6

 
$
138.6

 
$
262.2

 
$
229.0