Geographic and Customer Concentrations (Tables)

12 Months Ended

Dec. 31, 2023

Revenues [Abstract]

Schedule of operating revenues by geographic region

The following tables present total assets as of the years ended December 31, 2023 and 2022 as well as operating revenue for the years ended December 31, 2023, 2022 and 2021 by geographic region:

	Total Assets
	As of December 31,
	2023		2022
	(Dollars in millions)
North America	$	17,253	18,061
Europe, Middle East and Africa	—		1,698
Total	$	17,253	19,759

	Revenue
	Years Ended December 31,
	2023		2022	2021
	(Dollars in millions)
North America	$	6,345	6,256	6,365
Europe, Middle East and Africa(2)	628		734	805
Latin America(1)	64		503	782
Total	$	7,037	7,493	7,952

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(1)Includes revenue prior to closing the sale of the Latin American business on August 1, 2022, revenue recognized through post-closing commercial agreements subsequent to the sale and revenue related to servicing our customers in those regions.

(2)Includes revenue prior to closing the sale of the EMEA business on November 1, 2023.