Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Component of Income Taxes

	Years ended December 31,
	2019		2020		2021
	(In millions)
Expected tax expense, at U.S. federal statutory income tax rate of 21%	$	6.0	$	2.9	$	12.8
Non-taxable dividends received from Kronos		(5.3)		(5.3)		(5.3)
U.S. state income taxes and other, net		(.1)		(.1)		—
Income tax expense (benefit)	$	.6	$	(2.5)	$	7.5
Components of income tax expense (benefit):
Currently payable	$	.2	$	—	$	—
Deferred income tax expense (benefit)		.4		(2.5)		7.5
Income tax expense (benefit)	$	.6	$	(2.5)	$	7.5
Comprehensive provision (benefit) for income taxes allocable to:
Net income (loss)	$	.6	$	(2.5)	$	7.5
Additional paid-in capital		(.2)		(.1)		—
Other comprehensive income (loss):
Currency translation		(.1)		.9		(.4)
Pension plans		(.8)		(.7)		3.2
OPEB plans		—		(.1)		—
Total	$	(.5)	$	(2.5)	$	10.3

Components of Net Deferred Tax Liability

	December 31,
	2020				2021
	Assets		Liabilities		Assets		Liabilities
	(In millions)
Tax effect of temporary differences related to:
Inventories	$	.4	$	—	$	.5	$	—
Marketable securities		—		(3.6)		—		(7.0)
Property and equipment		—		(2.6)		—		(2.7)
Accrued OPEB costs		.3		—		.2		—
Accrued pension costs		.5		—		.5		—
Accrued employee benefits		1.1		—		1.3		—
Accrued environmental liabilities		29.1		—		26.7		—
Goodwill		—		(1.7)		—		(1.7)
Other accrued liabilities and deductible differences		—		—		.2		—
Other taxable differences		—		(2.3)		—		(2.3)
Investment in Kronos Worldwide, Inc.		—		(55.0)		—		(59.8)
Adjusted gross deferred tax assets (liabilities)		31.4		(65.2)		29.4		(73.5)
Netting of items by tax jurisdiction		(31.4)		31.4		(29.4)		29.4
Net noncurrent deferred tax liability	$	—	$	(33.8)	$	—	$	(44.1)