Noncontrolling Interest in Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2020

Noncontrolling Interest [Abstract]

Noncontrolling Interest in Net Assets of Subsidiaries

	December 31,
	2019		2020
	(In millions)
Noncontrolling interest in net assets:
Kronos Worldwide	$	216.6	$	212.3
NL Industries		65.8		67.1
CompX International		22.7		23.5
BMI		20.1		14.7
LandWell		14.9		6.8
Total	$	340.1	$	324.4

Schedule of Noncontrolling Interest in Net Income of Subsidiaries

	Years ended December 31,
	2018			2019		2020
	(In millions)
Noncontrolling interest in net income (loss) of subsidiaries:
Kronos Worldwide	$	39.9		$	16.9	$	12.1
NL Industries		(7.0	)		4.4		2.5
CompX International		2.0			2.2		1.4
BMI		1.5			2.2		7.6
LandWell		2.4			3.3		10.2
Total	$	38.8		$	29.0	$	33.8