Employee Benefit Plans (Tables)

12 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

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

	Year Ended March 31,
	2018		2017
Service costs	$	2.2	$	1.4
Interest costs	1.0		1.0
Amortization of actuarial loss	0.8		—
Settlements	—		0.5
Net pension period cost	$	4.0	$	2.9

Schedule of Changes in Projected Benefit Obligations

The change in projected benefit obligation and the accumulated benefit obligation, were as follows (amounts in millions):

	Year Ended March 31,
	2018			2017
Projected benefit obligation at the beginning of the year	$	50.4		$	40.3
Service cost	2.2			1.4
Interest cost	1.0			1.0
Settlements	—			0.5
Actuarial losses	0.7			7.9
Benefits paid	(0.8		)	(0.4		)
Foreign currency exchange rate changes	7.5			(0.3		)
Projected benefit obligation at the end of the year	$	61.0		$	50.4
Accumulated benefit obligation at the end of the year	$	55.5		$	45.6
Weighted average assumptions
Discount rate	1.73		%	1.82		%
Rate of compensation increase	2.91		%	2.90		%

Schedule of Assumptions Used

The change in projected benefit obligation and the accumulated benefit obligation, were as follows (amounts in millions):

	Year Ended March 31,
	2018			2017
Projected benefit obligation at the beginning of the year	$	50.4		$	40.3
Service cost	2.2			1.4
Interest cost	1.0			1.0
Settlements	—			0.5
Actuarial losses	0.7			7.9
Benefits paid	(0.8		)	(0.4		)
Foreign currency exchange rate changes	7.5			(0.3		)
Projected benefit obligation at the end of the year	$	61.0		$	50.4
Accumulated benefit obligation at the end of the year	$	55.5		$	45.6
Weighted average assumptions
Discount rate	1.73		%	1.82		%
Rate of compensation increase	2.91		%	2.90		%

Schedule of Expected Benefit Payments

Future estimated expected benefit payments for fiscal year 2019 through 2028 are as follows (amounts in millions):

Fiscal Year Ending March 31,	Expected Benefit Payments
2019	$	0.9
2020	0.9
2021	1.2
2022	1.6
2023	1.6
2024 through 2028	10.6
Total	$	16.8