XML 19 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
Business Acquisitions, Goodwill and Intangible Assets (Details 2) (USD $)
 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Professional Technical Services
Dec. 31, 2011
Professional Technical Services
Dec. 31, 2011
Management Support Services
Dec. 31, 2012
Management Support Services
Sep. 30, 2012
Management Support Services
Changes in the carrying value of goodwill by reporting segment              
Goodwill at the beginning of the period $ 1,775,352,000 $ 2,086,300,000 $ 1,608,600,000 $ 1,733,900,000 $ 352,400,000 $ 166,800,000 $ 166,800,000
Post-Acquisition Adjustments   (1,500,000)   500,000 (2,000,000)    
Foreign Exchange Impact (2,900,000) 4,200,000 (2,900,000) 4,200,000      
Acquired 44,500,000 8,900,000 44,500,000 8,900,000      
Goodwill at the end of the period $ 1,816,965,000 $ 2,097,900,000 $ 1,650,200,000 $ 1,747,500,000 $ 350,400,000 $ 166,800,000 $ 166,800,000