Commitments and Contingencies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2013 Company	Mar. 31, 2013	Jun. 30, 2012 acre	Apr. 13, 2013 Alleged Community Exposure to Chemical, one, three-Butadiene [Member]	Sep. 30, 2013 Obligation to Fund Remedial Activities [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
General unsecured claims eligible to receive common stock	2.5
Purchase of warrants	6.7
Common stock, price per share	$ 29.84
Percentage of common stock and warrants, reserved for disputed claims	13.40%
Common stock claim amount distributed, per share	$ 383.00
Company licensed to certain industrial battery products in foreign countries	80
Number of federally defined Superfund sites	50
Intended to disclose environmental remediation cost liability	$ 25.5	$ 25.4
Notification of Violation to Sue, Period				60 days
Expected cost for remediation, Minimum to Tampa, Florida	13.0
Expected cost for remediation, Maximum to Tampa, Florida	20.0
Costs for supplemental investigations, remediation and site closure, Minimum to Columbus, Georgia	6.0
Costs for supplemental investigations, remediation and site closure, Maximum to Columbus, Georgia	8.5
Agreement to sell acres of underdeveloped land			180
Asset sale contract, expected proceeds from sale						25.0	30.0
Escrow deposit					5.0
Outstanding letters of credit, face value	54.8
Surety bonds, face value	56.8
Collateral held by the sureties in the form of letters of credit	54.5
Bank guarantees outstanding	$ 17.8