	December 31, 2018		June 30, 2019
	(In millions)
Valhi:
Contran credit facility	$	314.3	$	313.0
Subsidiary debt:
Kronos:
Senior Secured Notes		452.4		449.7
Tremont:
Promissory note payable		9.4		7.3
BMI:
Bank loan – Western Alliance Bank		18.0		17.1
LandWell:
Note payable to the City of Henderson		2.1		1.9
Other		4.2		4.0
Total subsidiary debt		486.1		480.0
Total debt		800.4		793.0
Less current maturities		2.9		2.9
Total long-term debt	$	797.5	$	790.1

Valhi – Contran credit facility – During the first six months of 2019, we repaid a net $1.3 million under this facility. The average interest rate on the existing balance as of and for the six months ended June 30, 2019 was 6.5%. At June 30, 2019, the equivalent of $47.0 million was available for borrowing under this facility.

Kronos – Senior Secured Notes - At June 30, 2019, the carrying value of Kronos’ 3.75% Senior Secured Notes due September 15, 2025 (€400 million aggregate principal amount outstanding) is stated net of unamortized debt issuance costs of $5.8 million.

North American and European revolving credit facilities– During the first six months of 2019, Kronos had no borrowings or repayments under its North American revolving credit facility and its European revolving credit facility. At June 30, 2019, approximately $122.3 million was available for additional borrowing under the North American revolving credit facility. Kronos’ European revolving credit facility requires the maintenance of certain financial ratios, and one of such requirements is based on the ratio of net debt to last twelve months earnings before income tax, interest, depreciation and amortization expense (EBITDA) of the borrowers. Based upon the borrowers’ last twelve months EBITDA as of June 30, 2019 and the net debt to EBITDA financial test, the full €90.0 million of the credit facility ($102.5 million) is available for borrowing availability at June 30, 2019.

Tremont – Promissory note payable – During the first six months of 2019, Tremont prepaid (without penalty) $2.1 million principal amount on the note as required under the terms of the note agreement.

Restrictions and other – Certain of the credit facilities with unrelated, third-party lenders described above require the respective borrowers to maintain minimum levels of equity, require the maintenance of certain financial ratios, limit dividends and additional indebtedness and contain other provisions and restrictive covenants customary in lending transactions of this type. We are in compliance with all of our debt covenants at June 30, 2019.