Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Component of Income Taxes

	Three months ended
	March 31,
	2018			2019
	(In millions)
Expected tax expense, at U.S. federal    statutory income tax rate of 21%	$	3.8		$	3.8
Rate differences on equity in earnings of Kronos		(1.2	)		(1.4	)
U.S. state income taxes and other, net		.7			.2
Income tax expense	$	3.3		$	2.6
Comprehensive provision for income taxes allocable to:
Net income	$	3.3		$	2.6
Other comprehensive income:
Currency translation		.7			-
Pension plans		.3			.2
Total	$	4.3		$	2.8