Relationship with Former Parent and Related Entities (Tables)

12 Months Ended

Dec. 31, 2019

Related Party Transactions [Abstract]

Summary of amount due to and from related parties

Amounts due to and due from related party components as summarized in the below table: 

(Dollars in millions)	As of December 31
RELATED PARTY	2019		2018
Related party receivable	$	11	$	64
Related party notes receivable	$	—	$	1
Related party payables	$	3	$	16
Related party short term debt	$	1	$	1
Related party long-term debt	$	—	$	13