Fair Value Measurements and Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Marketable Securities and Financial Instruments on Fair Value Basis

The following table summarizes the valuation of our marketable securities, financial instruments and other items recorded on a fair value basis as of:

	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
December 31, 2017:
Marketable securities:
Current	$	3.0	$	—	$	3.0	$	—
Noncurrent		255.7		1.3		4.4		250.0
June 30, 2018:
Marketable securities:
Current	$	1.6	$	—	$	1.6	$	—
Noncurrent		256.8		3.8		3.0		250.0

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:

	December 31, 2017				June 30, 2018
	Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash equivalents	$	461.7	$	461.7	$	577.9	$	577.9
Deferred payment obligation		9.3		9.3		9.4		9.4
Long-term debt (excluding capitalized leases):
Kronos Senior Notes		471.1		495.1		458.6		449.3
Snake River Sugar Company fixed rate loans		250.0		250.0		250.0		250.0
Valhi credit facility with Contran		284.3		284.3		320.6		320.6
Tremont promissory note payable		13.1		13.1		10.9		10.9
BMI bank note payable		18.8		19.7		18.0		18.9
LandWell note payable to the City of Henderson		2.5		2.5		2.3		2.3