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Business Segment Information | 6 Months Ended
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Jun. 30, 2018
Segment Reporting [Abstract] |
Business Segment Information | Note 2—Business segment information:
Business segment |  | Entity |  | % controlled at June 30, 2018 |
Chemicals |  | Kronos |  | 80 | %
Component products |  | CompX |  | 87 | %
Real estate management and development |  | BMI and LandWell |  | 63% - 77 | %
Our control of Kronos includes 50% we hold directly and 30% held directly by NL. We own 83% of NL. Our control of CompX is through NL. We own 63% of BMI. Our control of LandWell includes the 27% we hold directly and 50% held by BMI.
| Three months ended June 30, |  |  | Six months ended June 30, |
| 2017 |  |  | 2018 |  |  | 2017 |  |  | 2018 |
| (unaudited) |
| (In millions) |
Net sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Chemicals | $ | 441.4 |  |  | $ | 471.8 |  |  | $ | 811.2 |  |  | $ | 902.2 |
Component products |  | 30.1 |  |  |  | 32.4 |  |  |  | 60.0 |  |  |  | 60.8 |
Real estate management and development |  | 10.3 |  |  |  | 6.0 |  |  |  | 15.9 |  |  |  | 13.2 |
Total net sales | $ | 481.8 |  |  | $ | 510.2 |  |  | $ | 887.1 |  |  | $ | 976.2 |
Cost of sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Chemicals | $ | 309.6 |  |  | $ | 300.5 |  |  | $ | 573.8 |  |  | $ | 556.6 |
Component products |  | 20.5 |  |  |  | 21.2 |  |  |  | 40.8 |  |  |  | 40.1 |
Real estate management and development |  | 7.9 |  |  |  | 4.5 |  |  |  | 12.1 |  |  |  | 10.2 |
Total cost of sales | $ | 338.0 |  |  | $ | 326.2 |  |  | $ | 626.7 |  |  | $ | 606.9 |
Gross margin: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Chemicals | $ | 131.8 |  |  | $ | 171.3 |  |  | $ | 237.4 |  |  | $ | 345.6 |
Component products |  | 9.6 |  |  |  | 11.2 |  |  |  | 19.2 |  |  |  | 20.7 |
Real estate management and development |  | 2.4 |  |  |  | 1.5 |  |  |  | 3.8 |  |  |  | 3.0 |
Total gross margin | $ | 143.8 |  |  | $ | 184.0 |  |  | $ | 260.4 |  |  | $ | 369.3 |
Operating income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Chemicals | $ | 77.2 |  |  | $ | 123.6 |  |  | $ | 136.3 |  |  | $ | 234.2 |
Component products |  | 4.6 |  |  |  | 6.0 |  |  |  | 9.1 |  |  |  | 10.4 |
Real estate management and development |  | 1.3 |  |  |  | .4 |  |  |  | 1.8 |  |  |  | 4.2 |
Total operating income |  | 83.1 |  |  |  | 130.0 |  |  |  | 147.2 |  |  |  | 248.8 |
General corporate items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities earnings |  | 7.1 |  |  |  | 8.5 |  |  |  | 14.1 |  |  |  | 16.8 |
Insurance recoveries |  | — |  |  |  | .2 |  |  |  | .1 |  |  |  | .4 |
Gain on land sales |  | — |  |  |  | — |  |  |  | — |  |  |  | 12.5 |
Other components of net periodic pension and OPEB expense |  | (4.3 | ) |  |  | (3.8 | ) |  |  | (8.4 | ) |  |  | (7.5 | )
Litigation settlement expense |  | — |  |  |  | (62.0 | ) |  |  | — |  |  |  | (62.0 | )
General expenses, net |  | (8.7 | ) |  |  | (14.9 | ) |  |  | (19.2 | ) |  |  | (29.2 | )
Interest expense |  | (14.7 | ) |  |  | (16.0 | ) |  |  | (29.2 | ) |  |  | (31.4 | )
Income from continuing operations before income taxes | $ | 62.5 |  |  | $ | 42.0 |  |  | $ | 104.6 |  |  | $ | 148.4 |
Segment results we report may differ from amounts separately reported by our various subsidiaries due to purchase accounting adjustments and related amortization or differences in the way we define operating income. Intersegment sales are not material.

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- References No definition available. + Details
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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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