Pension Plans (Tables)

3 Months Ended

Mar. 31, 2017

Components of Net Periodic Pension Cost

The components of net periodic pension cost are as follows:

	Three Months Ended March 31,
	2017			2016
(dollars in millions)
Service cost, net of employee contributions	$	6.6		$	7.3
Interest cost		4.8			4.7
Expected return on plan assets		(8.3	)		(8.1	)
Amortization		3.3			2.6
Net periodic pension cost	$	6.4		$	6.5