Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of comprehensive income (loss)

	Year Ended December 31
(Dollars in millions)	2020		2019		2018
Other Comprehensive Loss1
Cumulative translation adjustments	$	15	$	(34)	$	(10)
Pension liability, net of tax	(10)		(10)		(9)
Total ending balance	$	5	$	(44)	$	(19)
Deferred taxes on the pension liability	3		3		1

1The components of Other Comprehensive Loss are net of any related income tax effects.