Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements of Financial Instruments

The following table summarizes the valuation of our short-term investments and financial instruments by the ASC Topic 820 categories as of December 31, 2015 and 2016:

	Fair Value Measurements
	Total			Quoted Prices in Active Markets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(In millions)
Asset (liability)
December 31, 2015:
Marketable securities:
Current	$	2.0		$	—		$	2.0		$	—
Noncurrent		254.9			3.5			1.4			250.0
Currency forward contracts		(1.2	)		(1.2	)		—			—
Interest rate swap		(3.5	)		—			(3.5	)		—
December 31, 2016:
Marketable securities:
Current	$	4.4		$	—		$	4.4		$	—
Noncurrent		253.5			.6			2.9			250.0
Interest rate swap		(3.1	)		—			(3.1	)		—

Financial Instruments not Carried at Fair Value

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2015 and 2016:

	December 31, 2015				December 31, 2016
	Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash equivalents	$	229.1	$	229.1	$	191.0	$	191.0
Deferred payment obligation		8.8		8.8		9.0		9.0
Long-term debt (excluding capitalized leases):
Kronos term loan	$	338.0	$	309.5	$	335.9	$	334.6
Snake River Sugar Company fixed rate loans		250.0		250.0		250.0		250.0
WCS fixed rate debt		65.6		65.6		64.0		64.0
Valhi credit facility with Contran		263.8		263.8		278.9		278.9
Tremont promissory note payable		17.1		17.1		14.5		14.5
BMI bank note payable		9.3		9.4		8.4		8.5
LandWell note payable to the City of Henderson		3.1		3.1		2.9		2.9