Commitments and Contingencies (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012 Company Fund	Jul. 27, 2012	Mar. 31, 2012
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
Common stock claim amount distributed, per warrant	$ 153.00
Maintaining ratio of common stock issued to holders of pre petition secured claims to common stock distributed for unsecured claims	Nine times
Percentage of common stock and warrants reserved for distribution		72.00%
Company licensed to certain industrial battery products in foreign countries	80
Settlement to SCAOMD	$ 0.12
Penalty settlement to EPA	0.14
Settlement to DTSC	0.2
Number of federally defined Superfund sites	50
Intended to disclose environmental remediation cost liability	27.0		27.7
Expected cost for remediation, Minimum to Tampa, Florida	13.2
Expected cost for remediation, Maximum to Tampa, Florida	20.0
Costs for supplemental investigations, remediation and site closure, Minimum to Columbus, Georgia	5.7
Costs for supplemental investigations, remediation and site closure, Maximum to Columbus, Georgia	8.5
Outstanding letters of credit, face value	47.1
Surety bonds, face value	42.2
Collateral held by the sureties in the form of letters of credit	2.2
Bank guarantees outstanding	$ 19.5
Maximum repayment period of letters of credit	1 year