	December 31,			September 30,
	2019			2020
	(In millions)
Valhi:
Contran credit facility	$	313.0		$	301.2
Subsidiary debt:
Kronos:
Senior Notes		442.6			464.7
Tremont:
Promissory note payable		2.0			-
BMI:
Bank loan - Western Alliance Bank		17.2			16.3
LandWell:
Note payable to Western Alliance Business Trust		15.0		14.5
Note payable to the City of Henderson		1.6			-
Other		2.9			2.7
Total subsidiary debt		481.3			498.2
Total debt		794.3			799.4
Less current maturities		(4.9	)		(3.2	)
Total long-term debt	$	789.4		$	796.2

Valhi – Contran credit facility – During the first nine months of 2020, we had no borrowings and repaid $11.8 million under this facility. The average interest rate on the existing balance for the nine months ended September 30, 2020 was 4.6%. At September 30, 2020, the interest rate was 4.25% and $58.8 million was available for borrowing under this facility.

Kronos – Senior Notes - At September 30, 2020, 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 $4.8 million.

North American and European revolving credit facilities– During the first nine months of 2020, Kronos had no borrowings or repayments under its North American revolving credit facility and its European revolving credit facility. At September 30, 2020, approximately $125.0 million was available for 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 September 30, 2020 and the net debt to EBITDA financial test, the full €90.0 million of the credit facility ($105.6 million) was available for borrowing at September 30, 2020.

Tremont – Promissory note payable – During the first nine months of 2020, Tremont fully repaid (without penalty) the remaining principal balance of $2.0 million on the promissory note payable to Nevada Environmental Response Trust (“NERT”).

LandWell – In January 2020, LandWell fully repaid (without penalty) the remaining $1.6 million principal balance on its promissory note payable to the City of Henderson, Nevada.

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 September 30, 2020.