Long-term debt outstanding was as follows:



	Interest Rate	Maturity	December 31,
	Interest Rate	Maturity	2016		2015
			(In millions)
Surplus note — affiliated (1), (2)	8.60%	2038	$	744	$	750
Long-term debt — unaffiliated (3)	7.03%	2030	37		38
Total long-term debt (4)			$	781	$	788

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(1)	Payments of interest and principal on the affiliated surplus note, which is subordinate to all other obligations and may be made only with the prior approval of the Delaware Commissioner of Insurance (the “Delaware Commissioner”).


(2)	Includes $6 million of debt issuance costs at both December 31, 2016 and 2015. Debt issuance costs were reported in other assets at December 31, 2015.


(3)	Principal and interest is paid quarterly.


(4)	Excludes $23 million and $48 million of long-term debt relating to CSEs at December 31, 2016 and 2015, respectively. See Note 8.

In December 2014, Brighthouse Insurance repaid in cash at maturity its $75 million 6.80% affiliated note.

The aggregate maturities of long-term debt at December 31, 2016 were $1 million in 2017, $2 million in each of 2018, 2019, 2020 and 2021 and $772 million thereafter.

Interest expense related to the Company’s indebtedness is included in other expenses and was $67 million, $68 million and $73 million for the years ended December 31, 2016, 2015 and 2014, respectively.

Letters of Credit

The Company had access to unsecured revolving credit facilities from various banks, either directly with the bank or indirectly through letters of credit available to MetLife, Inc. for the benefit of the Company and certain other affiliates of MetLife, Inc. These facilities were used for collateral for certain of the Company’s affiliated reinsurance liabilities. Total fees associated with letters of credit was $10 million, $5 million and $13 million for the years ended December 31, 2016, 2015 and 2014, respectively, and was included in other expenses. At December 31, 2016, the Company had $0 in letters of credit outstanding and the remaining availability was $3.3 billion.