Pension and Postretirement Plans

As of March 31, 2019, the Company sponsors three noncontributory defined benefit plans and a postretirement health and life insurance plan in Cincinnati (collectively the "Cincinnati Plans"), and one noncontributory defined benefit plan for union employees, one cash balance pension plan for nonunion employees, and two postretirement health and life insurance plans for Hawaiian Telcom employees (collectively the "Hawaii Plans").

In accordance with ASC 715, only the service cost component of net benefit cost is eligible for capitalization, which was immaterial for the three months ended March 31, 2019 and 2018.

For the three months ended March 31, 2019 and 2018, pension and postretirement benefit costs (benefits) were as follows:



	Three Months Ended March 31,
	2019			2018			2019			2018
(dollars in millions)	Pension Benefits						Postretirement and Other Benefits
Service cost	$	—		$	—		$	0.2		$	0.1
Other components of pension and postretirement benefit plans expense:
Interest cost on projected benefit obligation	6.0			4.2			1.2			0.8
Expected return on plan assets	(7.8		)	(6.2		)	—			—
Amortization of:
Prior service benefit	—			—			(0.6		)	(0.8		)
Actuarial loss	3.4			4.3			0.4			1.0
Total amortization	3.4			4.3			(0.2		)	0.2
Pension / postretirement costs	$	1.6		$	2.3		$	1.2		$	1.1

Amortizations of prior service benefit and actuarial loss represent reclassifications from accumulated other comprehensive income.

Based on current assumptions, contributions are expected to be approximately $3 million to both the qualified and non-qualified pension plans in 2019. Management expects to make cash payments of approximately $11 million related to its postretirement health plans in 2019.

For the three months ended March 31, 2019, contributions to the pension plans were $1.1 million and contributions to the postretirement plans were $1.9 million. For the three months ended March 31, 2018, contributions to the pension plans were $1.3 million and contributions to the postretirement plan were $1.6 million.