Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Component of Income Taxes

	Three months ended
	March 31,
	2017			2018
	(In millions)
Expected tax expense, at U.S. federal    statutory income tax rate of 35% in 2017 and 21% in 2018	$	3.8		$	3.8
Rate differences on equity in earnings of Kronos		(1.6	)		(1.2	)
Nontaxable income		(.2	)		(.1	)
U.S. state income taxes and other, net		.2			.8
Income tax expense	$	2.2		$	3.3
Comprehensive provision for income taxes    (benefit) allocable to:
Net income	$	2.2		$	3.3
Other comprehensive income (loss):
Marketable securities		(.9	)		-
Currency translation		.9			.7
Interest rate swap		.1			-
Pension plans		.5			.3
OPEB plans		(.1	)		-
Total	$	2.7		$	4.3