Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2018

The components of net periodic pension cost were as follows (dollars in millions):



	Three months ended March 31,
	2018			2017
Service cost	$	2.7		$	4.0
Interest cost ⁽¹⁾	6.3			6.3
Expected return on plan assets ⁽¹⁾	(9.4		)	(9.4		)
Amortization of net loss ⁽¹⁾	7.8			5.7
Amortization of prior service credit ⁽¹⁾	(1.2		)	(1.2		)
Net periodic pension cost	$	6.2		$	5.4

⁽¹⁾ Included in Other - net on the Condensed Consolidated Statements of Operations

The components of net periodic cost of other postretirement benefits were as follows (dollars in millions):



	Three months ended March 31,
	2018			2017
Service cost	$	—		$	—
Interest cost ⁽¹⁾	0.1			0.2
Amortization of net loss ⁽¹⁾	0.2			0.2
Amortization of prior service credit ⁽¹⁾	(3.3		)	(3.3		)
Total other postretirement benefit cost	$	(3.0	)	$	(2.9	)

⁽¹⁾ Included in Other - net on the Condensed Consolidated Statements of Operations