Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of components of net periodic benefit cost

The Company’s net periodic benefit costs for plans for the three and six months ended June 30, 2021 and 2020 were as follows:

	Three Months Ended June 30				Six Months Ended June 30
(Dollars in millions)	2021		2020		2021		2020
Service cost	$	1	$	1	$	2	$	2
Interest cost	1		1		1		1
Expected return on plan assets	(1)		(1)		(1)		(1)
Net periodic benefit cost	$	1	$	1	$	2	$	2