Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Component of Income Taxes

		Three months ended						Six months ended
		June 30,						June 30,
		2017			2018			2017			2018
	(In millions)
Expected tax expense (benefit), at U.S. federal   statutory income tax rate of 35% in 2017 and 21% in 2018		$	21.7		$	(11.5	)	$	25.5		$	(7.7	)
Rate differences on equity in earnings of Kronos			(1.3	)		(1.2	)		(2.9	)		(2.4	)
Nontaxable income			-			(.1	)		(.2	)		(.2	)
U.S. state income taxes and other, net			(.1	)		.2			.1			1.0
Income tax expense (benefit)		$	20.3		$	(12.6	)	$	22.5		$	(9.3	)
Comprehensive provision for income taxes    (benefit) allocable to:
Net income (loss)		$	20.3		$	(12.6	)	$	22.5		$	(9.3	)
Other comprehensive income (loss):
Marketable securities			(1.6	)		-			(2.5	)		-
Currency translation			1.6			(1.6	)		2.5			(.9	)
Interest rate swap			(.1	)		-			-			-
Pension plans			.2			.2			.7			.5
OPEB plans			.1			-			-			-
Total		$	20.5		$	(14.0	)	$	23.2		$	(9.7	)