Employee Benefits

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Employee Benefits

Employee Benefits

Net periodic benefit (income) expense for our qualified and non-qualified pension plans included the following components:

	Pension Plans
	Three Months Ended March 31,
	2018			2017
	(Dollars in millions)
Service cost	$	16		17
Interest cost	100			101
Expected return on plan assets	(173		)	(166	)
Recognition of prior service credit	(2		)	(2	)
Recognition of actuarial loss	44			51
Net periodic pension benefit (income) expense	$	(15	)	1

Net periodic benefit expense for our post-retirement benefit plans included the following components:

	Post-Retirement Benefit Plans
	Three Months Ended March 31,
	2018		2017
	(Dollars in millions)
Service cost	$	4	4
Interest cost	24		25
Expected return on plan assets	—		—
Recognition of prior service cost	5		5
Net periodic post-retirement benefit expense	$	33	34

Benefits paid by our qualified pension plan are paid through a trust that holds all plan assets. Based on current laws and circumstances, we do not expect any contributions to be required for our qualified pension plan during the remainder of 2018. However, we currently expect to make a voluntary contribution of $100 million to the trust for our qualified pension plan during the remaining nine months of 2018.