Shareholder's Equity (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Voting Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, par value	$ 0
Preferred Stock, shares authorized	12.5
Nonvoting Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, par value	$ 0
Preferred Stock, shares authorized	12.5