4. Long-Term Debt

Long-term debt consists of the following (in millions):

Senior Secured Credit Facility

On March 9, 2011, the Company entered into a $700.0 million senior secured revolving credit facility, or the Credit Facility, with a syndicate of financial institutions as lenders and terminated its prior senior secured credit facility, or the Prior Credit Facility.

In March 2011, the Company used $196.0 million in U.S. dollar borrowings under the Credit Facility to repay all amounts outstanding under the Prior Credit Facility. The Company incurred approximately $5.7 million of debt issuance costs in connection with the Credit Facility. These debt issuance costs were recorded on the Company’s consolidated balance sheet and are being amortized over the term of the Credit Facility.

On July 26, 2012, the Company amended the Credit Facility to include a $500.0 million term loan with a syndicate of financial institutions as lenders, or the Term Loan. The Term Loan is a part of the Credit Facility and is in addition to the Company’s current revolving credit facility. The Term Loan matures on March 9, 2016. The Company will make regular scheduled payments for the Term Loan consisting of both principal and interest components.

In July 2012, the Company used all $500.0 million of the borrowings under the Term Loan to pay down amounts outstanding under the Company’s revolving credit facility. The Company incurred approximately $4.5 million of debt issuance costs in connection with the Term Loan. The debt issuance costs are recorded on the Company’s consolidated balance sheet and will be amortized over the life of the Term Loan.

In February 2014, in connection with issuing the $1.15 billion Convertible Notes described below, the Company amended the Credit Facility. Pursuant to this amendment, the Company amended the terms of the Credit Facility to provide for technical amendments to the indebtedness, asset sale and dividend covenants and the cross-default event of default to accommodate the issuance of the Convertible Notes and the capped call and prepaid forward share repurchase transactions described in greater detail in Note 8, Shareholders’ (Deficit) Equity. The amendment also increased by 0.50% the highest applicable margin payable by Herbalife in the event that Herbalife’s consolidated total leverage ratio is equal to or exceeds 2.50 to 1.00 and increased the permitted consolidated total leverage ratio of Herbalife under the Credit Facility. The Company incurred approximately $2.3 million of debt issuance costs in connection with the amendment. The debt issuance costs are recorded on the Company’s consolidated balance sheet and will be amortized over the life of the Credit Facility.

On May 4, 2015, the Company amended its Credit Facility to extend the maturity date of its revolving credit facility by one year to March 9, 2017. The Term Loan will mature on March 9, 2016. Pursuant to this amendment and upon execution, the Company made prepayments of approximately $20.3 million and $50.9 million on the Term Loan and revolving credit facility, respectively. Additionally, the Company’s $700 million borrowing capacity on its revolving credit facility was reduced by approximately $235.9 million upon execution of this amendment, and was further reduced by approximately $39.1 million on September 30, 2015, bringing the total available borrowing capacity on its revolving credit facility to $425.0 million as of December 31, 2015. Until March 9, 2016, the interest rates on the Company’s borrowings under the Credit Facility will effectively remain unchanged except that the minimum applicable margin will be increased by 0.50% and LIBOR will have a minimum floor of 0.25%. Based on the Company’s consolidated leverage ratio, U.S. dollar borrowings under the Credit Facility now bear interest at either LIBOR plus the applicable margin between 2.00% and 3.00% or the base rate plus the applicable margin between 1.00% and 2.00%. The base rate under the Credit Facility represents the highest of the Federal Funds Rate plus 0.50%, the one-month LIBOR plus 1.00%, and the prime rate offered by Bank of America. The Company, based on its consolidated leverage ratio, pays a commitment fee between 0.40% and 0.50% per annum on the unused portion of the Credit Facility. The Credit Facility also permits the Company to borrow limited amounts in Mexican Peso and Euro currencies based on variable rates. All obligations under the Credit Facility are unconditionally guaranteed by certain of the Company’s subsidiaries and are secured by substantially all of the assets of the U.S. subsidiaries of the parent company, Herbalife Ltd. and by certain assets of certain foreign subsidiaries of Herbalife Ltd.

After March 9, 2016, the applicable interest rates on the Company’s borrowings under the Credit Facility will increase by 2.00% such that borrowings under the Credit Facility will bear interest at either LIBOR plus the applicable margin between 4.00% and 5.00% or the base rate plus the applicable margin between 3.00% and 4.00%. The Company incurred approximately $6.2 million of debt issuance costs in connection with the amendment. The debt issuance costs are recorded on the Company’s consolidated balance sheet and will be amortized over the life of the revolving credit facility.

The Credit Facility requires the Company to comply with a leverage ratio and a coverage ratio. In addition, the Credit Facility contains customary covenants, including covenants that limit or restrict the Company’s ability to incur liens, incur indebtedness, make investments, dispose of assets, make certain restricted payments, pay dividends, repurchase its common shares, merge or consolidate and enter into certain transactions with affiliates. The Credit Facility restricts the Company’s ability to pay dividends or repurchase its common shares to a maximum of $233.0 million until maturity and for every one dollar of share repurchase or dividend paid, the revolving credit facility’s borrowing capacity is permanently decreased by two dollars. The Credit Facility also provides for the grant of security interest on certain additional assets of the Company and its subsidiaries. The Company is also required to maintain a minimum balance of $200.0 million of consolidated cash and cash equivalents. As of December 31, 2015 and December 31, 2014, the Company was compliant with its debt covenants under the Credit Facility.

On December 31, 2015 and December 31, 2014, the weighted average interest rate for borrowings under the Credit Facility, including borrowings under the Term Loan, was 2.78% and 3.04%, respectively.

During 2015, the Company did not make any borrowings and paid a total amount of $210.3 million under the Credit Facility. During 2014, the Company borrowed an aggregate amount of $50.0 million and paid a total amount of $131.3 million under the Credit Facility. During 2013, the Company borrowed an aggregate amount of $763.0 million and paid a total amount of $319.2 million under the Credit Facility. As of December 31, 2015 and December 31, 2014, the U.S. dollar amount outstanding under the Credit Facility was $639.7 million and $850.0 million, respectively. Of the $639.7 million U.S. dollar amount outstanding under the Credit Facility as of December 31, 2015, $229.7 million was outstanding on the Term Loan and $410.0 million was outstanding on the revolving credit facility. Of the $850.0 million U.S. dollar amount outstanding under the Credit Facility as of December 31, 2014, $350.0 million was outstanding on the Term Loan and $500.0 million was outstanding on the revolving credit facility. There were no outstanding foreign currency borrowings as of December 31, 2015 and December 31, 2014 under the Credit Facility.

The fair value of the outstanding borrowings on the Company’s revolving credit facility and Term Loan approximated their carrying values as of December 31, 2015 and 2014, due to their variable interest rates which reprice frequently and represent floating market rates. The fair value of the outstanding borrowings on the Company’s revolving credit facility and Term Loan are determined by utilizing Level 2 inputs as defined in Note 13, Fair Value Measurements, such as observable market interest rates and yield curves.

Convertible Senior Notes

During February 2014, the Company initially issued $1 billion aggregate principal amount of convertible senior notes, or Convertible Notes, in a private offering to qualified institutional buyers, pursuant to Rule 144A under the Securities Act of 1933, as amended. The Company granted an option to the initial purchasers to purchase up to an additional $150 million aggregate principal amount of Convertible Notes which was subsequently exercised in full during February 2014, resulting in a total issuance of $1.15 billion aggregate principal amount of Convertible Notes. The Convertible Notes are senior unsecured obligations which rank effectively subordinated to any of our existing and future secured indebtedness, including amounts outstanding under the Credit Facility, to the extent of the value of the assets securing such indebtedness. The Convertible Notes pay interest at a rate of 2.00% per annum payable semiannually in arrears on February 15 and August 15 of each year, beginning on August 15, 2014. The Convertible Notes mature on August 15, 2019, unless earlier repurchased or converted. The Company may not redeem the Convertible Notes prior to their stated maturity date. Holders of the Convertible Notes may convert their notes at their option under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending March 31, 2014, if the last reported sale price of the Company’s common shares for at least 20 trading days (whether or not consecutive) in a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price for the Convertible Notes on each applicable trading day; (ii) during the five business-day period immediately after any five consecutive trading day period, or the measurement period, in which the trading price per $1,000 principal amount of Convertible Notes for each trading day of that measurement period was less than 98% of the product of the last reported sale price of the Company’s common shares and the conversion rate for the Convertible Notes for each such day; or (iii) upon the occurrence of specified corporate events. On and after May 15, 2019, holders may convert their Convertible Notes at any time, regardless of the foregoing circumstances. Upon conversion, the Convertible Notes will be settled in cash and, if applicable, the Company’s common shares, based on the applicable conversion rate at such time. The Convertible Notes had an initial conversion rate of 11.5908 common shares per $1,000 principal amount of the Convertible Notes (which is equal to an initial conversion price of approximately $86.28 per common share).

The Company incurred approximately $26.6 million of issuance costs during the first quarter of 2014 relating to the issuance of the Convertible Notes. Of the $26.6 million issuance costs incurred, $21.5 million and $5.1 million were recorded as debt issuance costs and as additional paid-in capital, respectively, in proportion to the allocation of the proceeds of the Convertible Notes. The $21.5 million of debt issuance costs recorded on the Company’s consolidated balance sheet is being amortized over the contractual term of the Convertible Notes using the effective interest method.

During February 2014, the $1.15 billion proceeds received from the issuance of the Convertible Notes were initially allocated between long-term debt, or liability component, and additional paid-in-capital, or equity component, within the Company’s consolidated balance sheet at $930.9 million and $219.1 million, respectively. The liability component was measured using the nonconvertible debt interest rate. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the face value of the Convertible Notes as a whole. Since the Company must still settle these Convertible Notes at face value at or prior to maturity, this liability component will be accreted up to its face value resulting in additional non-cash interest expense being recognized within the Company’s consolidated statements of income while the Convertible Notes remain outstanding. The effective interest rate on the Convertible Notes is approximately 6.2% per annum. The equity component is not remeasured as long as it continues to meet the conditions for equity classification.

As of December 31, 2015, the outstanding principal on the Convertible Notes was $1.15 billion, the unamortized debt discount and debt issuance costs was $167.6 million, and the carrying amount of the liability component was $982.5 million, which was recorded to long-term debt within the Company’s consolidated balance sheet as reflected in the table above within this Note. As of December 31, 2015, the fair value of the liability component relating to the Convertible Notes was approximately $795.9 million. As of December 31, 2014, the outstanding principal on the Convertible Notes was $1.15 billion, the unamortized debt discount and debt issuance costs was $206.5 million, and the carrying amount of the liability component was $943.5 million, which was recorded to long-term debt within the Company’s consolidated balance sheet as reflected in the table above within this Note. As of December 31, 2014, the fair value of the liability component relating to the Convertible Notes was approximately $802.8 million. At December 31, 2015 and 2014, the Company determined the fair value of the liability component of the Convertible Notes using two valuation methods. The Company reviewed market data that was available for publicly traded, senior, unsecured nonconvertible corporate bonds issued by companies with similar credit ratings. Assumptions used in the estimate represent what market participants would use in pricing the liability component, including market yields and credit standing to develop the straight debt yield estimate. The Company also used a lattice model, which included inputs such as stock price, the Convertible Note trading price, volatility and dividend yield to estimate the straight debt yield. The Company combined the results of the two valuation methods to determine the fair value of the liability component of the Convertible Notes. Most of these inputs are primarily considered Level 2 and Level 3 inputs. This valuation approach was similar to the approach the Company used to determine the initial fair value of the liability component of the Convertible Notes on the February 7, 2014 issuance date.

In conjunction with the issuance of the Convertible Notes, during February 2014, the Company paid approximately $685.8 million to enter into prepaid forward share repurchase transactions, or the Forward Transactions, with certain financial institutions, and paid approximately $123.8 million to enter into capped call transactions with respect to its common shares, or the Capped Call Transactions, with certain financial institutions. See Note 8, Shareholders’ (Deficit) Equity, for additional discussion on the Forward Transactions and Capped Call Transactions entered into in conjunction with the issuance of these Convertible Notes.

During the year ended December 31, 2015, the Company recognized $61.7 million of interest expense relating to the Convertible Notes, which included $35.7 million relating to non-cash interest expense relating to the debt discount and $3.2 million relating to amortization of deferred financing costs. The Company’s total interest expense, including the Credit Facility, was $100.5 million, $91.7 million, and $26.6 million, for the years ended December 31, 2015, 2014, and 2013, respectively, which was recognized within its consolidated statement of income.

As of December 31, 2015, the aggregate annual maturities of the Credit Facility were expected to be $229.7 million for 2016 and $410.0 million for 2017. The $1.15 billion principal amount of the Convertible Notes is due in 2019.

Certain vendors and government agencies may require letters of credit or similar guaranteeing arrangements to be issued or executed. As of December 31, 2015, the Company had $45.3 million of issued but undrawn letters of credit or similar arrangements, which included the Mexico VAT related surety bonds described in Note 7, Contingencies.