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Marketable Securities (Tables)
 12 Months Ended
Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]  
Marketable Securities

 

Marketable security

 

Fair value measurement level

 

Market

value

 

 

Cost

basis

 

 

Unrealized

gain (loss)

 

 

 

 

 

(In millions)

 

December 31, 2015:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valhi common stock

 

1

 

$

2.3

 

 

$

3.2

 

 

$

(.9

)

NL and CompX common stocks

 

1

 

 

.1

 

 

 

.1

 

 

 

-

 

Total

 

 

 

$

2.4

 

 

$

3.3

 

 

$

(.9

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2016:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valhi common stock

 

1

 

$

5.9

 

 

$

3.2

 

 

$

2.7

 

NL and CompX common stocks

 

1

 

 

.1

 

 

 

.1

 

 

 

-

 

Total

 

 

 

$

6.0

 

 

$

3.3

 

 

$

2.7