Other Expense - Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Other Expense - Net [Abstract]
Equity in earnings (loss) of non-consolidated affiliate	$ 0	$ 0.2	$ 0.1	$ (0.2)
Interest income	0.1	0.2	0.5	0.6
Foreign currency transactions	(0.3)	(2.1)	(0.6)	(8.0)
Other non-operating (expense) income - net	(0.1)	0.1	0	0
Total other expense - net	$ (0.3)	$ (1.6)	$ 0	$ (7.6)