Debt

As of September 30, 2016, contractual maturities of debt for the years ending December 31 are as follows:



	Total		2016		2017		2018		2019		2020		Thereafter
	(In millions)
5.375% Notes	$	700	$	—	$	—	$	—	$	—	$	—	$	700
1.125% Convertible Notes	550		—		—		—		—		550		—
1.625% Convertible Notes (1)	302		—		—		—		—		—		302
	$	1,552	$	—	$	—	$	—	$	—	$	550	$	1,002


(1)	The 1.625% Notes have a contractual maturity date in 2044; however, on contractually specified dates beginning in 2018, holders of the 1.625% Notes may require us to repurchase some or all of the 1.625% Notes, or we may redeem any or all of the 1.625% Notes.

Substantially all of our debt is held at the parent, which is reported in the Other segment. The principal amounts, unamortized discount (net of premium related to the 1.625% Notes), unamortized issuance costs, and net carrying amounts of debt were as follows:



	Principal Balance		Unamortized Discount		Unamortized Issuance Costs		Net Carrying Amount
	(In millions)
September 30, 2016:
5.375% Notes	$	700	$	—	$	10	$	690
1.125% Convertible Notes	550		78		6		466
1.625% Convertible Notes	302		18		3		281
	$	1,552	$	96	$	19	$	1,437
December 31, 2015:
5.375% Notes	$	700	$	—	$	11	$	689
1.125% Convertible Notes	550		95		7		448
1.625% Convertible Notes	302		25		4		273
Other	1		—		—		1
	$	1,553	$	120	$	22	$	1,411

Interest cost recognized relating to our convertible senior notes for the periods presented was as follows:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
	(In millions)
Contractual interest coupon rate	$	2	$	3	$	8	$	9
Amortization of the discount	7		7		22		21
	$	9	$	10	$	30	$	30

Debt Commitment Letter. On August 2, 2016, in connection with the Medicare Acquisition, we entered into a debt commitment letter with Barclays Bank PLC (Barclays). The primary terms of the debt commitment letter provide that Barclays will lend us up to $400 million which may be used as follows: to finance the Medicare Acquisition, including related transaction costs and regulatory or statutory capital requirements; to finance any ongoing working capital requirements; or for other general corporate purposes.

5.375% Notes due 2022. On November 10, 2015, we completed the private offering of $700 million aggregate principal amount of senior notes (5.375% Notes) due November 15, 2022, unless earlier redeemed. In connection with their issuance and sale, we entered into a registration rights agreement to exchange the 5.375% Notes for registered notes having substantially identical terms, including guarantees. Such exchange was completed on September 16, 2016. Interest on the 5.375% Notes is payable semiannually in arrears on May 15 and November 15.

Certain of our wholly owned subsidiaries jointly and severally guarantee our obligations under the 5.375% Notes. The 5.375% Notes contain customary non-financial covenants and change of control provisions. At September 30, 2016, we were in compliance with all financial covenants under the 5.375% Notes.

Credit Facility. In June 2015, we entered into an unsecured $250 million revolving credit facility (Credit Facility). The Credit Facility has a term of five years and all amounts outstanding will be due and payable on June 12, 2020. Subject to obtaining commitments from existing or new lenders and satisfaction of other specified conditions, we may increase the Credit Facility to up to $350 million. As of September 30, 2016, outstanding letters of credit amounting to $6 million reduced the borrowing capacity to $244 million, and no amounts were outstanding under the Credit Facility.

Borrowings under the Credit Facility bear interest based, at our election, on a base rate or an adjusted London Interbank Offered Rate (LIBOR), plus in each case the applicable margin. In addition to interest payable on the principal amount of indebtedness outstanding from time to time under the Credit Facility, we are required to pay a quarterly commitment fee.

Certain of our wholly owned subsidiaries jointly and severally guarantee our obligations under the Credit Facility. The Credit Facility contains customary non-financial and financial covenants, including a minimum fixed charge coverage ratio, a maximum debt-to-EBITDA ratio and minimum statutory net worth. At September 30, 2016, we were in compliance with all financial covenants under the Credit Facility.

1.125% Cash Convertible Senior Notes due 2020. In February 2013, we issued $550 million aggregate principal amount of 1.125% cash convertible senior notes (1.125% Notes) due January 15, 2020, unless earlier repurchased or converted.

Interest is payable semiannually in arrears on January 15 and July 15. The 1.125% Notes are convertible only into cash, and not into shares of our common stock or any other securities. The initial conversion rate for the 1.125% Notes is 24.5277 shares of our common stock per $1,000 principal amount of the 1.125% Notes. This represents an initial conversion price of approximately $40.77 per share of our common stock. The 1.125% Notes met the stock price trigger in the quarter ended September 30, 2016, and are convertible to cash through at least December 31, 2016. Because the 1.125% Notes may be converted into cash within 12 months, the $466 million carrying amount is reported in current portion of long-term debt as of September 30, 2016.

The 1.125% Notes contain an embedded cash conversion option (the 1.125% Conversion Option), which was separated from the 1.125% Notes and accounted for separately as a derivative liability, with changes in fair value reported in our consolidated statements of income until the 1.125% Conversion Option settles or expires. The initial fair value liability of the 1.125% Conversion Option simultaneously reduced the carrying value of the 1.125% Notes (effectively an original issuance discount). This discount is amortized to the 1.125% Notes' principal amount through the recognition of non-cash interest expense over the expected life of the debt. This has resulted in our recognition of interest expense on the 1.125% Notes at an effective rate of approximately 6%. As of September 30, 2016, the 1.125% Notes have a remaining amortization period of 3.3 years. The 1.125% Notes' if-converted value exceeded their principal amount by approximately $177 million and $332 million as of September 30, 2016 and December 31, 2015, respectively.

1.625% Convertible Senior Notes due 2044. In September 2014, we issued $125 million principal amount of 1.625% convertible senior notes (1.625% Notes) due August 15, 2044, unless earlier repurchased, redeemed or converted. Combined with the 1.625% Notes issued in an exchange transaction in 2014, the aggregate principal amount of 1.625% Notes issued was $302 million. Interest is payable semiannually in arrears on February 15 and August 15. The initial conversion rate for the 1.625% Notes is 17.2157 shares of our common stock per $1,000 principal amount of the 1.625% Notes. This represents an initial conversion price of approximately $58.09 per share of our common stock. As of September 30, 2016, the 1.625% Notes were not convertible.

Because the 1.625% Notes are net share settled and have cash settlement features, we have allocated the principal amount between a liability component and an equity component. The reduced carrying value on the 1.625% Notes resulted in a debt discount that is amortized back to the 1.625% Notes' principal amount through the recognition of non-cash interest expense over the expected life of the debt. The expected life of the debt is approximately four years, beginning on the issuance date and ending on the first date we may redeem the 1.625% Notes in August 2018. As of September 30, 2016, the 1.625% Notes have a remaining amortization period of 1.9 years. This has resulted in our recognition of interest expense on the 1.625% Notes at an effective rate approximating what we would have incurred had nonconvertible debt with otherwise similar terms been issued, or approximately 5%. The outstanding 1.625% Notes’ if-converted value did not exceed their principal amount at September 30, 2016 and exceeded their principal amount at December 31, 2015 by approximately $10 million. At September 30, 2016 and December 31, 2015, the equity component of the 1.625% Notes, including the impact of deferred taxes, was $23 million.