Pension Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Expected periodic pension cost in current fiscal year	$ 3.2
Benefits paid	0.2	$ 0.1
Defined benefit plan expected contributions in current fiscal year	$ 1.2
FRANCE | Minimum
Defined Benefit Plan Disclosure [Line Items]
Termination benefits, salary period (in months)	1 month
FRANCE | Maximum
Defined Benefit Plan Disclosure [Line Items]
Termination benefits, salary period (in months)	5 months