Employee Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2022

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following summarizes the components of net periodic (benefit) cost for our qualified and supplemental pension plans:

(Dollars in millions)	Three months ended June 30,				Six months ended June 30,
	2022		2021		2022		2021
Service cost	$	3	$	3	$	5	$	5
Non-service (benefit) costs:
Interest cost	2		3		5		5
Expected return on plan assets	(5)		(6)		(11)		(11)
Amortization of actuarial loss and prior service cost	—		1		—		3
Other	—		—		—		2
Total non-service benefit	(3)		(2)		(6)		(1)
Net periodic (benefit) cost	$	—	$	1	$	(1)	$	4