Employee Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2022		2021
Service cost	$	2	$	2
Non-service (benefit) costs:
Interest cost	3		2
Expected return on plan assets	(6)		(5)
Amortization of actuarial loss and prior service cost	—		2
Other	—		2
Total non-service (benefit) cost	(3)		1
Net periodic (benefit) cost	$	(1)	$	3