Subsequent Events Subsequent Events (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012 facilities	Sep. 30, 2012 facilities
Subsequent Event [Line Items]
Number of Businesses Acquired	14	12
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 257
Business Acquisition, Cost of Acquired Entity, Cash Paid		197
Business Acquisition, Purchase Price Allocation, Liabilities Assumed		60
Remaining Cash Payment to Acquire Entities		$ 23
Minimum [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage		46.00%
Maximum [Member]
Subsequent Event [Line Items]
Equity Method Investment, Ownership Percentage		100.00%