CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.025	$ 0.025
Preferred stock, shares authorized (in shares)	16.0	16.0
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	80.0	80.0
Common stock, shares issued (in shares)	48.2	47.8
Treasury stock at cost (in shares)	0.7	0.6