CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2016	Mar. 31, 2015
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	0.0
Common stock, par value (in dollars per shares)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	80.0	80.0
Common stock, shares issued (in shares)	49.0	48.6
Treasury stock at cost (in shares)	1.6	0.7