Employee Retirement Benefits (Tables)

9 Months Ended

Sep. 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 September 30,				Nine months ended September 30,
	2022		2021		2022		2021
Service cost	$	2	$	2	$	7	$	7
Non-service (benefit) costs:
Interest cost	3		2		8		7
Expected return on plan assets	(6)		(5)		(17)		(16)
Amortization of actuarial loss and prior service cost	—		2		—		5
Other	—		—		—		2
Total non-service benefit	(3)		(1)		(9)		(2)
Net periodic (benefit) cost	$	(1)	$	1	$	(2)	$	5