Customer Concentration

12 Months Ended

Dec. 31, 2021

Risks and Uncertainties [Abstract]

Customer Concentration

CUSTOMER CONCENTRATION

The following table shows external customers with revenues of 10% or greater of total revenues from external customers and external customers with accounts receivable, net of current expected credit losses and contract assets, net of current expected credit losses balances of 10% or greater of total accounts receivable, net of current expected credit losses from external customers and contract assets, net of current expected credit losses from external customers, respectively:

	Percentage of Total Revenues from External Customers			Percentage of Accounts Receivable, Net and Contract Assets, Net from External Customers
	Year Ended December 31,			December 31,
	2021	2020	2019	2021	2020
Customer A	12%	14%	16%	10%	14%
Customer B	12%	12%	10%	*	12%
Customer C	10%	10%	11%	*	*
Customer D	*	10%	11%	*	*

* 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.

	Revenues from External Customers
	Year Ended December 31,
	2021		2020		2019
Ireland	$	1,838	$	1,130	$	989
Singapore	1,740		646		533
South Korea	1,680		942		1,207
Spain	1,577		1,034		598
India	1,375		1,021		1,160
United States	1,340		2,466		2,807
United Kingdom	1,246		678		559
Other countries	5,068		1,441		1,877
Total	$	15,864	$	9,358	$	9,730