Pension Plans (Tables)

9 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Schedule of net benefit costs

The aggregate net pension expense relating to these plans is as follows (in millions):

	Three Months Ended					Nine Months Ended
	December 31,					December 31,
	2018			2017		2018			2017
Service costs	$	0.4		$	0.4	$	1.2		$	1.2
Interest costs	0.3			0.3		0.8			0.7
Return on plan assets	(0.1		)	—		(0.1		)	—
Amortization of actuarial loss	0.3			0.2		0.8			0.6
Net pension period cost	$	0.9		$	0.9	$	2.7		$	2.5