Basis of Presentation (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2010	Sep. 30, 2011	Dec. 31, 2010
Basis of Presentation [Abstract]
Revenue reclassification adjustment	$ (7.4)	$ (17.8)
Office and general expense reclassification adjustment	(7.4)	(17.8)
Accounts payable adjustment			2,316.2	2,332.2
Accrued liabilities adjustment			$ (2,316.2)	$ (2,332.2)