Annual report pursuant to Section 13 and 15(d)

Customer Concentration

v3.10.0.1
Customer Concentration
12 Months Ended
Dec. 31, 2018
Risks and Uncertainties [Abstract]  
Customer Concentration
CUSTOMER CONCENTRATION
  
The following table shows customers with revenues of 10% or greater of total revenues from external customers and customers with accounts receivable balances of 10% or greater of total accounts receivable from external customers:
 
Percentage of Total Revenues from External Customers
 
Percentage of Accounts Receivable from External Customers
 
 
Year Ended December 31,
 
December 31,
 
 
2018
 
2017
 
2016
 
2018
 
2017
Customer A
 
28%
 
39%
 
52%
 
35%
 
39%
Customer B
 
21%
 
27%
 
*
 
23%
 
32%
Customer C
 
23%
 
23%
 
—%
 
30%
 
26%
Customer D
 
19%
 
—%
 
—%
 
8%
 
—%
 

* Less than 10%

The following table shows revenues from external customers attributable to the country in which the revenues were derived (in millions). We attribute revenues from external customers to the country in which the party to the applicable agreement has its principal place of business. Substantially all of our long-lived assets are located in the United States.
 
Revenues from External Customers
 
Year Ended December 31,
 
2018
 
2017
 
2016
United States
$
1,880

 
$
1,441

 
$
677

South Korea
1,168

 
666

 

Ireland
1,098

 
787

 
63

India
981

 

 
23

Other countries

 
21

 
39

Total
$
5,127

 
$
2,915

 
$
802