Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		$ 376.2
Other comprehensive (loss) income before reclassification		(4.8)	$ 8.7
Reclassification from accumulated other comprehensive loss	[1]	1.3	1.8
Income taxes		(0.4)	(0.6)
Total other comprehensive income (loss)		(3.9)	9.9
Ending balance		381.1
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		(174.2)	(198.6)
Ending balance		(178.1)	(188.7)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		(36.0)	(40.7)
Other comprehensive (loss) income before reclassification		(4.8)	8.7
Reclassification from accumulated other comprehensive loss	[1]	0.0	0.0
Income taxes		0.0	0.0
Total other comprehensive income (loss)		(4.8)	8.7
Ending balance		(40.8)	(32.0)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		(138.2)	(157.9)
Other comprehensive (loss) income before reclassification		0.0	0.0
Income taxes		(0.4)	(0.6)
Total other comprehensive income (loss)		0.9	1.2
Ending balance		(137.3)	(156.7)
Unrecognized Net Loss [Member]
Accumulated Other Comprehensive Loss [Line Items]
Reclassification from accumulated other comprehensive loss	[1]	$ 1.3	$ 1.8

[1] Amounts are included in the calculation of net periodic benefit cost for the Company's defined benefit plans, which include pension and other postretirement plans. See Note 4 for additional information about the Company's pension plans.