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BUSINESS AND GEOGRAPHIC AREAS
 12 Months Ended
Dec. 31, 2019
Segment Reporting [Abstract]  
Business and Geographic Regions BUSINESS AND GEOGRAPHIC REGIONS
TDCC conducts its worldwide operations through principal product groups, and the Corporation's business activities comprise components of TDCC's principal product groups rather than stand-alone operations. The Corporation sells substantially all of its products to TDCC in order to simplify the customer interface process at market-based prices in accordance with the terms of an agreement between UCC and TDCC. Because there are no separate reportable business segments for the Corporation and no detailed business information is provided to a chief operating decision maker regarding the Corporation's stand-alone operations, the Corporation's results are reported as a single operating segment.

Sales are attributed to geographic regions based on customer location; long-lived assets are attributed to geographic regions based on asset location. Sales to external customers and long-lived assets by geographic region were as follows:

Geographic Region Information
United States
Asia Pacific
Rest of World
Total
In millions
2019
 
 
 
 
Sales to external customers 1
$
105

$
24

$
9

$
138

Long-lived assets
$
1,329

$
18

$
22

$
1,369

2018
 
 
 
 
Sales to external customers 1
$
124

$
2

$
10

$
136

Long-lived assets
$
1,413

$
10

$
25

$
1,448

2017
 
 
 
 
Sales to external customers 1
$
110

$
21

$
12

$
143

Long-lived assets
$
1,341

$
9

$
29

$
1,379


1.
Of total sales to external customers, sales in Malaysia were approximately 17 percent in 2019, 1 percent in 2018 and 15 percent in 2017, and are included in Asia Pacific.