Income Taxes (Tables)

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Component of Income Taxes

	Three months ended						Six months ended
	June 30,						June 30,
	2018			2019			2018			2019
	(In millions)
Expected tax expense (benefit), at U.S. federal    statutory income tax rate of 21%	$	(11.5	)	$	1.6		$	(7.7	)	$	5.4
Rate differences on equity in earnings of Kronos		(1.2	)		(1.1	)		(2.4	)		(2.5	)
U.S. state income taxes and other, net		.1			.1			.8			.3
Income tax expense (benefit)	$	(12.6	)	$	.6		$	(9.3	)	$	3.2
Comprehensive provision for income taxes (benefit) allocable to:
Net income (loss)	$	(12.6	)	$	.6		$	(9.3	)	$	3.2
Other comprehensive income:
Currency translation		(1.6	)		.5			(.9	)		.5
Pension plans		.2			.2			.5			.4
Total	$	(14.0	)	$	1.3		$	(9.7	)	$	4.1