Debt

Debt consists of the following ($ in millions):



	December 31, 2014			December 31, 2013
$425 million 5.75% Senior notes, due June 1, 2017	$	429		$	431
$300 million 4.75% Senior notes, due May 15, 2022	300			—
Fair value of interest rate swap agreements	11			10
Senior notes	740			441
Revolving credit agreement	75			150
Mortgage notes payable	70			73
Capital leases	8			5
Total debt	893			669
Less current portion	(5		)	(3		)
Long term debt	$	888		$	666

Senior Notes

In April 2014, the Company issued $300 million of 4.75% Senior Notes due May 15, 2022 ($300 Million Notes) at par. In connection with the April 2014 issuance, the Company entered into interest rate swap agreements for a notional amount of $300 million. Gains and losses due to changes in the fair value of the interest rate swap agreements completely offset changes in the fair value of the hedged portion of the underlying debt and are recorded as an adjustment to the $300 Million Notes.

The indentures governing both the $425 million and the $300 million notes contain non-financial and financial covenants, including requirements of a minimum fixed charge coverage ratio.

Interest Rate Swaps

The Company uses interest rate swap agreements to convert a portion of its interest rate exposure from fixed rates to floating rates to more closely align interest expense with interest income received on its cash equivalent and variable rate investment balances. The Company has $550 million of notional amount of interest rate swap agreements consisting of $250 million which are scheduled to expire on June 1, 2017 and $300 million that are scheduled to expire May 15, 2022. Under the Swap Agreements, the Company receives a fixed rate of interest and pays an average variable rate of the three month LIBOR plus 2.83% adjusted quarterly. At December 31, 2014, the weighted average rate was 3.06%.

The Swap Agreements are formally designated and qualify as fair value hedges and are recorded at fair value in the Consolidated Balance Sheet in other assets or other liabilities. Gains and losses due to changes in fair value of the interest rate swap agreements completely offset changes in the fair value of the hedged portion of the underlying debt. Therefore, no gain or loss has been recognized due to hedge ineffectiveness. Offsetting changes in fair value of both the interest rate swaps and the hedged portion of the underlying debt both were recognized in interest expense in the Consolidated Statement of Operations. The Company does not hold or issue any derivative instrument for trading or speculative purposes.

The fair values of the Swap Agreements as of December 31, 2014 were assets of approximately $11 million and are included in other long term assets in the Consolidated Balance Sheet. The fair value of the Swap Agreements excludes accrued interest and takes into consideration current interest rates and current likelihood of the swap counterparties' compliance with its contractual obligations.

Revolving Credit Agreement

In May 2013, the Company entered into an unsecured $500 million revolving credit facility. Borrowings under the agreement bear interest based upon LIBOR rates, the Federal Funds Rate or the Prime Rate. The agreement has a maturity date of June 1, 2018, provided it will mature 90 days prior to the maturity date of the Company's 5.75% Senior Notes due 2017 if such notes are not refinanced (or extended), certain financial conditions are not met, or the Company does not carry $100 million of unrestricted cash. As of December 31, 2014, the Company had $75 million of borrowings outstanding under the agreement with a weighted average interest rate of 1.91%.

The agreement contains non-financial and financial covenants, including requirements of minimum fixed charge coverage ratios, maximum debt-to-EBITDA ratios and minimum tangible net worth. The Company is required to not exceed a maximum debt-to-EBITDA ratio of 3.0 to 1.0. As of December 31, 2014, there were no limitations on the availability under the revolving credit agreement as a result of the debt-to-EBITDA ratio.

Mortgage Notes Payable

The Company has a non-recourse mortgage note of $70 million at December 31, 2014 collateralized by its corporate headquarters building. The mortgage note is due January 1, 2021 and bears a 5.14% interest rate. The collateralized property had a net book value of $159 million at December 31, 2014.

Letters of Credit & Surety Bonds

The Company had outstanding letters of credit of $30 million as of December 31, 2014, which were not part of the revolving credit facility. As discussed in Note 3 Acquisitions and Noncontrolling Interest, the Company also had letters of credit for $58 million (valued at December 31, 2014 conversion rate), or €48 million, representing its proportional share of the letters of credit issued to support Ribera Salud's outstanding debt which are a part of the revolving credit facility. Collectively, the letters of credit bore interest at 1.73% as of December 31, 2014. The Company had outstanding surety bonds of $142 million as of December 31, 2014.

Aggregate maturities for the Company's debt are as follows ($ in millions):



2015	$	5
2016	4
2017	429
2018	79
2019	4
Thereafter	357
Total	$	878

The fair value of outstanding debt was approximately $901 million and $673 million at December 31, 2014 and 2013, respectively.