Noncontrolling Interest in Subsidiaries (Tables)

3 Months Ended

Mar. 31, 2018

Noncontrolling Interest [Abstract]

Noncontrolling Interest in Net Assets of Subsidiaries

	December 31, 2017		March 31, 2018
	(In millions)
Noncontrolling interest in net assets:
Kronos Worldwide	$	204.9	$	217.5
NL Industries		71.1		74.1
CompX International		17.8		18.2
BMI		26.0		27.5
LandWell		22.5		25.1
Total	$	342.3	$	362.4

Schedule of Noncontrolling Interest in Net Income of Subsidiaries

	Three months ended March 31,
	2017		2018
	(In millions)
Noncontrolling interest in net income of subsidiaries:
Kronos Worldwide	$	7.2	$	13.8
NL Industries		1.4		2.4
CompX International		.4		.5
BMI		—		.6
LandWell		.1		1.2
Total	$	9.1	$	18.5