Noncontrolling Interest in Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2022

Noncontrolling Interest [Abstract]

Noncontrolling Interest in Net Assets of Subsidiaries

	December 31,
	2021		2022
	(In millions)
Noncontrolling interest in net assets:
Kronos Worldwide	$	226.6	$	239.3
NL Industries		75.7		79.0
CompX International		22.5		20.6
BMI		8.3		6.9
LandWell		(4.2)		2.4
Total	$	328.9	$	348.2

Schedule of Noncontrolling Interest in Net Income of Subsidiaries

	Years ended December 31,
	2020		2021		2022
	(In millions)
Noncontrolling interest in net income of subsidiaries:
Kronos Worldwide	$	12.1	$	22.0	$	20.0
NL Industries		2.5		8.7		5.8
CompX International		1.4		2.2		2.6
BMI		7.6		14.7		2.8
LandWell		10.2		22.9		14.7
Total	$	33.8	$	70.5	$	45.9