Long-term debt (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Long-Term Debt

	December 31,		March 31,
	2023		2024
	(In millions)
Valhi:
Contran credit facility	$	93.4	$	72.8
Subsidiary debt:
Kronos:
Kronos International, Inc. 9.50% Senior Secured Notes due 2029		—		292.3
Kronos International, Inc. 3.75% Senior Secured Notes due 2025		440.9		80.9
Subordinated, Unsecured Term Loan from Contran		—		53.7
LandWell:
Note payable to Western Alliance Business Trust		12.2		12.2
Total subsidiary debt		453.1		439.1
Total debt		546.5		511.9
Less current maturities		.7		.7
Total long-term debt	$	545.8	$	511.2