Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Series B Preferred Stock [Member]	Sep. 30, 2011 Series C Preferred Stock [Member]
SUPPLEMENTAL CASH FLOWS DISCLOSURE:
Conversion of convertible preferred stock amount converted	15.0	50.0