Pensions (Tables)

6 Months Ended

Sep. 30, 2017

Pensions [Abstract]

Components of pension cost

Pension cost included the following components:

	Three months ended September 30,						Six months ended September 30,
	2017			2016			2017			2016
Service cost	$	0.2		$	0.2		$	0.3		$	0.3
Interest cost		2.4			2.4			4.9			4.8
Expected return on plan assets		(3.0	)		(3.1	)		(6.0	)		(6.1	)
Amortization of unrecognized net loss		1.4			1.4			2.8			2.8
Net periodic benefit cost	$	1.0		$	0.9		$	2.0		$	1.8