Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES

v3.8.0.1
DEBT AND CREDIT FACILITIES
12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
DEBT AND CREDIT FACILITIES
NOTE 5 - DEBT AND CREDIT FACILITIES
The following represents a summary of our long-term debt as of December 31, 2017 and 2016:
($ in Millions)
December 31, 2017
Debt Instrument
 
Annual Effective Interest Rate
 
Total Principal Amount
 
Debt Issuance Costs
 
Unamortized Discounts
 
Total Debt
Senior Secured Notes
 
 
 
 
 
 
 
 
 
 
$400 Million 4.875% 2024 Senior Notes
 
5.00%
 
$
400.0

 
$
(7.1
)
 
$
(2.6
)
 
$
390.3

Unsecured Notes
 
 
 
 
 
 
 
 
 
 
$400 Million 5.90% 2020 Senior Notes
 
5.98%
 
88.9

 
(0.2
)
 
(0.1
)
 
88.6

$500 Million 4.80% 2020 Senior Notes
 
4.83%
 
122.4

 
(0.3
)
 
(0.1
)
 
122.0

$700 Million 4.875% 2021 Senior Notes
 
4.89%
 
138.4

 
(0.3
)
 
(0.1
)
 
138.0

$316.25 Million 1.50% 2025 Convertible Senior Notes
 
6.26%
 
316.3

 
(6.6
)
 
(85.6
)
 
224.1

$1.075 Billion 5.75% 2025 Senior Notes
 
6.01%
 
1,075.0

 
(11.3
)
 
(16.5
)
 
1,047.2

$800 Million 6.25% 2040 Senior Notes
 
6.34%
 
298.4

 
(2.4
)
 
(3.4
)
 
292.6

ABL Facility
 
N/A
 
550.0

 
N/A

 
N/A

 

Fair Value Adjustment to Interest Rate Hedge
 
 
 
 
 
 
 
 
 
1.4

Long-term debt
 
 
 
 
 
 
 
 
 
$
2,304.2

($ in Millions)
December 31, 2016
Debt Instrument
 
Annual Effective Interest Rate
 
Total Principal Amount
 
Debt Issuance Costs
 
Undiscounted Interest/(Unamortized Discounts)
 
Total Debt
Senior Secured Notes
 
 
 
 
 
 
 
 
 
 
$540 Million 8.25% 2020 First Lien Notes
 
9.97%
 
$
540.0

 
$
(8.0
)
 
$
(25.7
)
 
$
506.3

$218.5 Million 8.00% 2020 1.5 Lien Notes
 
N/A
 
218.5

 

 
65.7

 
284.2

$544.2 Million 7.75% 2020 Second Lien Notes
 
15.55%
 
430.1

 
(5.8
)
 
(85.2
)
 
339.1

Unsecured Notes
 
 
 
 
 
 
 
 
 
 
$400 Million 5.90% 2020 Senior Notes
 
5.98%
 
225.6

 
(0.6
)
 
(0.5
)
 
224.5

$500 Million 4.80% 2020 Senior Notes
 
4.83%
 
236.8

 
(0.7
)
 
(0.2
)
 
235.9

$700 Million 4.875% 2021 Senior Notes
 
4.89%
 
309.4

 
(1.0
)
 
(0.2
)
 
308.2

$800 Million 6.25% 2040 Senior Notes
 
6.34%
 
298.4

 
(2.5
)
 
(3.4
)
 
292.5

ABL Facility
 
N/A
 
550.0

 
N/A

 
N/A

 

Fair Value Adjustment to Interest Rate Hedge
 
 
 
 
 
 
 
 
 
1.9

Long-term debt
 
 
 


 
 
 
 
 
$
2,192.6

Less current portion
 
 
 
 
 
 
 
 
 
17.5

Long-term debt
 
 
 
 
 
 
 
 
 
$
2,175.1


$1.075 Billion 5.75% 2025 Senior Notes - 2017 Offering
On February 27, 2017, we entered into an indenture among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee, relating to the issuance of $500 million aggregate principal amount of 5.75% 2025 Senior Notes. On August 7, 2017, we issued an additional $575 million aggregate principal amount of our 5.75% 2025 Senior Notes. The second tranche was issued at 97.0% of face value. The 5.75% 2025 Senior Notes were issued in private transactions exempt from the registration requirements of the Securities Act. Pursuant to the registration rights agreement executed as part of the offerings, we agreed to file a registration statement with the SEC with respect to a registered offer to exchange the 5.75% 2025 Senior Notes for publicly registered notes within 365 days of the closing date, with all significant terms and conditions remaining the same.
The 5.75% 2025 Senior Notes bear interest at a rate of 5.75% per annum, which is payable semi-annually in arrears on March 1 and September 1 of each year, which commenced on September 1, 2017. The 5.75% 2025 Senior Notes mature on March 1, 2025.
The 5.75% 2025 Senior Notes are general unsecured senior obligations and rank equally in right of payment with all of our existing and future senior unsecured indebtedness and rank senior in right of payment to all of our existing and future subordinated indebtedness. The 5.75% 2025 Senior Notes are effectively subordinated to our existing or future secured indebtedness to the extent of the value of the assets securing such indebtedness. The 5.75% 2025 Senior Notes are guaranteed on a senior unsecured basis by our material direct and indirect wholly-owned domestic subsidiaries and, therefore, are structurally senior to any of our existing and future indebtedness that is not guaranteed by such guarantors and are structurally subordinated to all existing and future indebtedness and other liabilities of our subsidiaries that do not guarantee the 5.75% 2025 Senior Notes.
The terms of the 5.75% 2025 Senior Notes are governed by an indenture, which contains customary covenants that, among other things, limit our and our subsidiaries' ability to create liens on property that secure indebtedness, enter into sale and leaseback transactions and merge, consolidate or amalgamate with another company. Upon the occurrence of a “change of control triggering event,” as defined in the indenture, we are required to offer to repurchase the 5.75% 2025 Senior Notes at 101% of the aggregate principal amount thereof, plus any accrued and unpaid interest, if any, to, but excluding, the repurchase date.
We may redeem the 5.75% 2025 Senior Notes, in whole or in part, on or after March 1, 2020, at the redemption prices set forth in the indenture, plus accrued and unpaid interest, if any, to, but not including, the date of redemption, and prior to March 1, 2020, at a redemption price equal to 100% of the principal amount thereof plus a “make-whole” premium set forth in the indenture, plus accrued and unpaid interest, if any, to, but not including, the date of redemption. We may also redeem up to 35% of the aggregate principal amount of the 5.75% 2025 Senior Notes on or prior to March 1, 2020 at a redemption price equal to 105.75% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the date of redemption with the net cash proceeds of one or more equity offerings.
The 5.75% 2025 Senior Notes indenture contains customary events of default, including failure to make required payments, failure to comply with certain agreements or covenants, failure to pay or acceleration of certain other indebtedness, certain events of bankruptcy and insolvency and failure to pay certain judgments. An event of default under the indenture will allow either the trustee or the holders of at least 25% in aggregate principal amount of the then-outstanding notes issued under the indenture to accelerate, or in certain cases, will automatically cause the acceleration of, the amounts due under the 5.75% 2025 Senior Notes.
Debt issuance costs of $12.4 million were incurred related to the offering of the 5.75% 2025 Senior Notes, $11.3 million of which is included in Long-term debt in the Statements of Consolidated Financial Position as of December 31, 2017.
$400 Million 4.875% 2024 Senior Secured Notes - 2017 Offering
On December 19, 2017, we entered into an indenture among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee and first lien notes collateral agent, relating to the issuance of $400 million aggregate principal amount of 4.875% 2024 Senior Secured Notes at 99.347% of face value. The 4.875% 2024 Senior Secured Notes were issued in a private transaction exempt from the registration requirements of the Securities Act. The 4.875% 2024 Senior Secured Notes have not been, and will not be, registered under the Securities Act and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act.
The 4.875% 2024 Senior Secured Notes bear interest at a rate of 4.875% per annum, which is payable semi-annually in arrears on January 15 and July 15 of each year, commencing on July 15, 2018. The 4.875% 2024 Senior Secured Notes mature on January 15, 2024 and are secured senior obligations of the Company.
The 4.875% 2024 Senior Secured Notes are jointly and severally and fully and unconditionally guaranteed on a senior secured basis by substantially all of our material domestic subsidiaries and will be secured (subject in each case to certain exceptions and permitted liens) by (i) a first-priority lien on substantially all of our assets and the assets of the Guarantors (other than accounts receivable and other rights to payment, inventory, as-extracted collateral, certain investment property, certain general intangibles and commercial tort claims, certain mobile equipment, commodities accounts, deposit accounts, securities accounts and other related assets and proceeds and products of each of the foregoing (collectively, the “ABL Collateral”)), and (ii) a second-priority lien on the ABL Collateral, which is junior to a first-priority lien for the benefit of the lenders under the Company’s senior secured asset-based credit facility.
The terms of the 4.875% 2024 Senior Secured Notes are governed by the Secured Notes Indenture. The Secured Notes Indenture contains customary covenants that, among other things, limit our and our subsidiaries’ ability to create certain liens on property that secure indebtedness, use proceeds of dispositions of collateral, enter into sale and leaseback transactions, merge or consolidate with another company, and transfer or sell all or substantially all of our assets. Upon the occurrence of a “change of control triggering event,” as defined in the Secured Notes Indenture, we are required to offer to repurchase the 4.875% 2024 Senior Secured Notes at 101% of the aggregate principal amount thereof, plus any accrued and unpaid interest, if any, to, but excluding, the repurchase date.
We may redeem any of the Secured Notes beginning on January 15, 2021. The initial redemption price is 102.438% of their principal amount, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. The redemption price will decline each year after January 15, 2021 and will be 100% of their principal amount, plus accrued interest, beginning on January 15, 2023. We may also redeem some or all of the 4.875% 2024 Senior Secured Notes at any time and from time to time prior to January 15, 2021 at a price equal to 100% of the principal amount thereof plus a “make-whole” premium, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. We may also redeem up to 10% of the original aggregate principal amount of the 4.875% 2024 Senior Secured Notes (calculated after giving effect to any issuance of additional 4.875% 2024 Senior Secured Notes) per year prior to January 15, 2021 at a redemption price equal to 103% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but excluding, the redemption date.
In addition, at any time and from time to time on or prior to January 15, 2021, we may redeem in the aggregate up to 35% of the original aggregate principal amount of the Secured Notes (calculated after giving effect to any issuance of additional 4.875% 2024 Senior Secured Notes) with the net cash proceeds of certain equity offerings, at a redemption price of 104.875%, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, so long as at least 65% of the original aggregate principal amount of the 4.875% 2024 Senior Secured Notes (calculated after giving effect to any issuance of additional 4.875% 2024 Senior Secured Notes) issued under the Secured Notes Indenture remain outstanding after each such redemption.
The Secured Notes Indenture contains customary events of default, including failure to make required payments, failure to comply with certain agreements or covenants, failure to pay or acceleration of certain other indebtedness, certain events of bankruptcy and insolvency, and failure to pay certain judgments. An event of default under the Secured Notes Indenture will allow either the Trustee or the holders of at least 25% in aggregate principal amount of the then-outstanding 4.875% 2024 Senior Secured Notes to accelerate, or in certain cases, will automatically cause the acceleration of, the amounts due under the 4.875% 2024 Senior Secured Notes.
Debt issuance costs of $7.1 million were incurred related to the offering of the 4.875% 2024 Senior Secured Notes and are included in Long-term debt in the Statements of Consolidated Financial Position as of December 31, 2017.
$316.25 Million 1.50% 2025 Convertible Senior Notes - 2017 Offering
On December 19, 2017, we issued $316.25 million aggregate principal amount of 1.50% 2025 Convertible Senior Notes. The 1.50% 2025 Convertible Senior Notes bear interest at a rate of 1.50% per year, payable semiannually in arrears on January 15 and July 15 of each year, beginning on July 15, 2018. The 1.50% 2025 Convertible Senior Notes mature on January 15, 2025.
Holders may convert their 1.50% 2025 Convertible Senior Notes at their option at any time prior to the close of business on the business day immediately preceding July 15, 2024, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2018 (and only during such calendar quarter), if the last reported sale price of our common shares, par value $0.125 per share, for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five-business day period after any five-consecutive trading day period (the “measurement period”) in which the trading price (as defined below) per $1,000 principal amount of 1.50% 2025 Convertible Senior Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common shares and the conversion rate on each such trading day; (3) if we call the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after July 15, 2024 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 1.50% 2025 Convertible Senior Notes at any time, regardless of the foregoing circumstances. Upon conversion, we will pay or deliver, as the case may be, cash, common shares or a combination of cash and common shares, at our election.
The conversion rate will initially be 122.4365 common shares per $1,000 principal amount of 1.50% 2025 Convertible Senior Notes (equivalent to an initial conversion price of $8.17 per common share). The conversion rate will be subject to adjustment in some circumstances but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date, or if we deliver a notice of redemption, we will, in certain circumstances, increase the conversion rate for a holder who elects to convert its 1.50% 2025 Convertible Senior Notes in connection with such a corporate event or notice of redemption, as the case may be.
We may not redeem the 1.50% 2025 Convertible Senior Notes prior to January 15, 2022. We may redeem all or any portion of the 1.50% 2025 Convertible Senior Notes, for cash at our option on or after January 15, 2022 if the last reported sale price of our common shares has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30-consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the 1.50% 2025 Convertible Senior Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the 1.50% 2025 Convertible Senior Notes.
It is our current intent to settle conversions through combination settlement with a specified dollar amount per $1,000 principal amount of notes of $1,000.  Our ability to settle conversions through combination settlement and cash settlement will be subject to restrictions in the agreement governing our ABL Facility and may be subject to restrictions in agreements governing our future debt.
If we undergo a fundamental change as defined in the indenture, holders may require us to repurchase for cash all or any portion of their 1.50% 2025 Convertible Senior Notes at a fundamental change repurchase price equal to 100% of the principal amount of the 1.50% 2025 Convertible Senior Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.
The 1.50% 2025 Convertible Senior Notes are senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the 1.50% 2025 Convertible Senior Notes; equal in right of payment to any of our unsecured indebtedness that is not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries.
In accounting for the issuance of the notes, we separated the 1.50% 2025 Convertible Senior Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component of $85.9 million representing the conversion option was determined by deducting the fair value of the liability component from the par value of the notes. The difference represents the debt discount that is amortized to interest expense over the term of the notes. The equity component is not remeasured as long as it continues to qualify for equity classification.
We allocated the total debt issuance costs incurred to the notes on a prorated basis using the aggregate principal balance. In accounting for the debt issuance costs related to the notes, we allocated the total amount of issuance costs incurred to liability and equity components. The issuance costs attributable to the equity component was netted against the equity component in Capital in excess of par value of shares for a net amount of $83.4 million. Debt issuance costs of $9.1 million were incurred related to the offering of the Secured Notes, $6.6 million of which are included in Long-term debt and $2.5 million of which are included in Capital in excess of par value of shares in the Statements of Consolidated Financial Position as of December 31, 2017.
Other Outstanding Unsecured Senior Notes
The following represents a summary of our unsecured senior notes' maturity and interest payable due dates:
Debt Instrument
 
Maturity
 
Interest Payable
(until maturity)
$400 Million 5.90% 2020 Senior Notes
 
March 15, 2020
 
March 15 and September 15
$500 Million 4.80% 2020 Senior Notes
 
October 1, 2020
 
April 1 and October 1
$700 Million 4.875% 2021 Senior Notes
 
April 1, 2021
 
April 1 and October 1
$800 Million 6.25% 2040 Senior Notes
 
October 1, 2040
 
April 1 and October 1

The senior notes are unsecured obligations and rank equally in right of payment with all our other existing and future unsecured and unsubordinated indebtedness. There are no subsidiary guarantees of the interest and principal amounts.
The senior notes may be redeemed any time at our option not less than 30 days nor more than 60 days after prior notice is sent to the holders of the applicable series of notes. The senior notes are redeemable at a redemption price equal to the greater of (1) 100% of the principal amount of the notes to be redeemed or (2) the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semi-annual basis at the treasury rate plus 35 basis points with respect to the 5.90% 2020 Senior Notes and 4.80% 2020 Senior Notes, 25 basis points with respect to the 4.875% 2021 Senior Notes and 40 basis points with respect to the 6.25% 2040 Senior Notes, plus, in each case, accrued and unpaid interest to the date of redemption. However, if the 4.875% 2021 Senior Notes are redeemed on or after the date that is three months prior to their maturity date, the 4.875% 2021 Senior Notes will be redeemed at a redemption price equal to 100% of the principal amount of the notes to be redeemed plus accrued and unpaid interest to the date of redemption.
In addition, if a change of control triggering event occurs with respect to the senior notes, as defined in the agreement, we will be required to offer to purchase the notes of the applicable series at a purchase price equal to 101% of the principal amount, plus accrued and unpaid interest, if any, to the date of purchase.
The terms of the senior notes contain certain customary covenants; however, there are no financial covenants.
Debt Extinguishments - 2017
During the year ended December 31, 2017, we issued 63.25 million common shares in an underwritten public offering. We received net proceeds of $661.3 million at a public offering price of $10.75 per common share. The net proceeds from the issuance of our common shares and the net proceeds from the issuance of $1.075 billion 5.75% 2025 Senior Notes were used to redeem in full all of our outstanding 8.25% 2020 First Lien Notes, 8.00% 2020 1.5 Lien Notes and 7.75% 2020 Second Lien Notes. Additionally, through tender offers, we purchased certain of our 5.90% 2020 Senior Notes, our 4.80% 2020 Senior Notes and our 4.875% 2021 Senior Notes. The aggregate principal amount outstanding of debt redeemed was $1.611 billion, which resulted in a loss on extinguishment of $165.4 million.
The following is a summary of the debt extinguished during the year ended December 31, 2017 and the respective gain (loss) on extinguishment for the year ended December 31, 2017:
(In Millions)
 
 
Year Ended
December 31, 2017
 
 
Debt Extinguished
 
Gain (Loss) on Extinguishment1
Secured Notes
 
 
 
 
$540 Million 8.25% 2020 First Lien Notes
 
$
540.0

 
$
(93.5
)
$218.5 Million 8.00% 2020 1.5 Lien Notes
 
218.5

 
45.1

$544.2 Million 7.75% 2020 Second Lien Notes
 
430.1

 
(104.5
)
Unsecured Notes
 
 
 
 
$400 Million 5.90% 2020 Senior Notes
 
136.7

 
(7.8
)
$500 Million 4.80% 2020 Senior Notes
 
114.4

 
(1.9
)
$700 Million 4.875% 2021 Senior Notes
 
171.0

 
(2.8
)
 
 
$
1,610.7

 
$
(165.4
)
 
 
 
 
 
1 This includes premiums paid related to the redemption of our notes of $110.0 million.

Debt Extinguishments/Restructuring - 2016
8.00% 2020 1.5 Lien Notes Exchange
On March 2, 2016, we entered into an indenture among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee and notes collateral agent, relating to our issuance of $218.5 million aggregate principal amount of 8.00% 2020 1.5 Lien Notes. The 8.00% 2020 1.5 Lien Notes were issued in exchange offers for certain of our existing senior notes.
We accounted for the 8.00% 2020 1.5 Lien Notes exchange as a troubled debt restructuring. For an exchange classified as a troubled debt restructuring, if the future undiscounted cash flows of the newly issued debt are less than the net carrying value of the original debt, the carrying value of the newly issued debt is adjusted to the future undiscounted cash flow amount, a gain is recorded for the difference and no future interest expense is recorded. All future interest payments on the newly issued debt reduce the carrying value.  Accordingly, we recognized a gain of $174.3 million in the Gain (loss) on extinguishment/restructuring of debt in the Statements of Consolidated Operations for the year ended December 31, 2016. Debt issuance costs incurred of $5.2 million related to the notes exchange were expensed and were included in the Gain (loss) on extinguishment/restructuring of debt in the Statements of Consolidated Operations for the year ended December 31, 2016. As of December 31, 2016, $17.5 million of the undiscounted interest was recorded as current and classified as Other current liabilities in the Statements of Consolidated Financial Position.
The following is a summary of the debt exchanged for our $218.5 million 8.00% 2020 1.5 Lien Notes:
($ In Millions)
 
 
Debt Extinguished
 
1.5 Lien Amount Issued
 
Carrying Value1
 
Gain on Restructuring2
$544.2 Million 7.75% 2020 Second Lien Notes
 
$
114.1

 
$
57.0

 
$
77.5

 
$
6.9

$500 Million 3.95% 2018 Senior Notes
 
17.6

 
11.4

 
15.5

 
1.8

$400 Million 5.90% 2020 Senior Notes
 
65.1

 
26.0

 
35.4

 
28.3

$500 Million 4.80% 2020 Senior Notes
 
44.7

 
17.9

 
24.4

 
19.5

$700 Million 4.875% 2021 Senior Notes
 
76.3

 
30.5

 
41.5

 
33.3

$800 Million 6.25% 2040 Senior Notes
 
194.4

 
75.7

 
103.0

 
84.5

 
 
$
512.2

 
$
218.5

 
$
297.3

 
$
174.3

 
 
 
 
 
 
 
 
 
1 Includes undiscounted interest payments
2 Net of amounts expensed for unamortized original issue discount and deferred origination fees

Debt-for-Equity Exchanges
During the year ended December 31, 2016, we entered into a series of privately negotiated exchange agreements whereby we issued an aggregate of 8.2 million common shares in exchange for $10.0 million aggregate principal amount of our 3.95% 2018 Senior Notes, $20.1 million aggregate principal amount of our 4.80% 2020 Senior Notes and $26.8 million aggregate principal amount of our 4.875% 2021 Senior Notes. There were no exchanges that represented more than 1% of our outstanding common shares during any quarter. Accordingly, we recognized a gain of $11.3 million in Gain (loss) on extinguishment/restructuring of debt in the Statements of Consolidated Operations for the year ended December 31, 2016.
Other Debt Redemptions
Our 3.95% 2018 Senior Notes were redeemed in whole on September 16, 2016 at a total redemption price of $301.0 million, which included $283.6 million outstanding aggregate principal. As a result, we recorded a $19.9 million pre-tax loss on full retirement of long-term debt in the third quarter of 2016, which consisted of debt redemption premiums of $17.4 million and expenses of $2.5 million related to the write-off of unamortized debt issuance costs, unamortized bond discount and deferred losses on interest rate swaps. The loss was recorded against the Gain (loss) on extinguishment/restructuring of debt in the Statements of Consolidated Operations for the year ended December 31, 2016.
During the year ended December 31, 2016, we purchased with cash $5.0 million of our outstanding 4.80% 2020 Senior Notes, which resulted in a gain on extinguishment of $0.6 million.
Debt Maturities
The following represents a summary of our maturities of debt instruments, excluding borrowings on the ABL Facility, based on the principal amounts outstanding at December 31, 2017:
 
(In Millions)
 
Maturities of Debt
2018
$

2019

2020
211.3

2021
138.4

2022

2023 and thereafter
2,089.7

Total maturities of debt
$
2,439.4


ABL Facility
On March 30, 2015, we entered into a senior secured asset-based revolving credit facility with various financial institutions. The ABL Facility will mature upon the earlier of March 30, 2020 or 60 days prior to the maturity of the First Lien Notes and certain other material debt, and provides for up to $550.0 million in borrowings, comprised of (i) a $450.0 million U.S. tranche, including a $250.0 million sublimit for the issuance of letters of credit and a $100.0 million sublimit for U.S. swingline loans, and (ii) a $100.0 million Australian tranche, including a $50.0 million sublimit for the issuance of letters of credit and a $20.0 million sublimit for Australian swingline loans. Availability under both the U.S. tranche and Australian tranche of the ABL Facility is limited to an eligible U.S. borrowing base and Australian borrowing base, as applicable, determined by applying customary advance rates to eligible accounts receivable, inventory and certain mobile equipment.
The ABL Facility and certain bank products and hedge obligations are guaranteed by us and certain of our existing wholly-owned U.S. and Australian subsidiaries and are required to be guaranteed by certain of our future U.S. and Australian subsidiaries; provided, however, that the obligations of any U.S. entity will not be guaranteed by any Australian entity. Amounts outstanding under the ABL Facility will be secured by (i) a first-priority security interest in the ABL Collateral, including, in the case of the Australian tranche only, ABL Collateral owned by a borrower or guarantor that is organized under the laws of Australia, and (ii) a third-priority security interest in the Notes Collateral (as defined herein). The priority of the security interests in the ABL Collateral and the Notes Collateral of the lenders under the ABL Facility and the holders of the First Lien Notes are set forth in intercreditor provisions contained in an ABL intercreditor agreement.
The ABL Collateral generally consists of the following assets: accounts receivable and other rights to payment, inventory, as-extracted collateral, investment property, certain general intangibles and commercial tort claims, certain mobile equipment, commodities accounts, deposit accounts, securities accounts and other related assets and proceeds and products of each of the foregoing.
Borrowings under the ABL Facility bear interest, at our option, at a base rate, an Australian base rate or, if certain conditions are met, a LIBOR rate, in each case plus an applicable margin. The base rate is equal to the greater of the federal funds rate plus ½ of 1%, the LIBOR rate based on a one-month interest period plus 1% and the floating rate announced by Bank of America Merrill Lynch as its “prime rate.” The Australian base rate is equal to the LIBOR rate as of 11:00 a.m. on the first business day of each month for a one-month period. The LIBOR rate is a per annum fixed rate equal to LIBOR with respect to the applicable interest period and amount of LIBOR rate loan requested.
The ABL Facility contains customary representations and warranties and affirmative and negative covenants including, among others, covenants regarding the maintenance of certain financial ratios if certain conditions are triggered, covenants relating to financial reporting, covenants relating to the payment of dividends on, or purchase or redemption of our capital stock, covenants relating to the incurrence or prepayment of certain debt, covenants relating to the incurrence of liens or encumbrances, compliance with laws, transactions with affiliates, mergers and sales of all or substantially all of our assets and limitations on changes in the nature of our business.
The ABL Facility provides for customary events of default, including, among other things, the event of nonpayment of principal, interest, fees, or other amounts, a representation or warranty proving to have been materially incorrect when made, failure to perform or observe certain covenants within a specified period of time, a cross-default to certain material indebtedness, the bankruptcy or insolvency of the Company and certain of its subsidiaries, monetary judgment defaults of a specified amount, invalidity of any loan documentation, a change of control of the Company, and ERISA defaults resulting in liability of a specified amount. In the event of a default by us (beyond any applicable grace or cure period, if any), the administrative agent may and, at the direction of the requisite number of lenders, shall declare all amounts owing under the ABL Facility immediately due and payable, terminate such lenders’ commitments to make loans under the ABL Facility and/or exercise any and all remedies and other rights under the ABL Facility. For certain defaults related to insolvency and receivership, the commitments of the lenders will be automatically terminated and all outstanding loans and other amounts will become immediately due and payable.
As of December 31, 2017 and 2016, we were in compliance with the ABL Facility liquidity requirements and, therefore, the springing financial covenant requiring a minimum fixed charge coverage ratio of 1.0 to 1.0 was not applicable.
As of December 31, 2017, no loans were drawn under the ABL Facility and we had total availability of $273.2 million as a result of borrowing base limitations. As of December 31, 2017, the principal amount of letter of credit obligations totaled $46.5 million, thereby further reducing available borrowing capacity on our ABL Facility to $226.7 million.    
As of December 31, 2016, no loans were drawn under the ABL Facility and we had total availability of $333.0 million as a result of borrowing base limitations. As of December 31, 2016, the principal amount of letter of credit obligations totaled $106.0 million, thereby further reducing available borrowing capacity to $227.0 million.
Letters of Credit
We issued standby letters of credit with certain financial institutions in order to support business obligations including, but not limited to, workers compensation and environmental obligations. As of December 31, 2017 and 2016, these letter of credit obligations totaled $46.5 million and $106.0 million, respectively.