XML 64 R41.htm IDEA: XBRL DOCUMENT v2.4.0.8
Accounts Receivable-Net (Details) (USD $)
 6 Months Ended 12 Months Ended
Mar. 31, 2014
Sep. 30, 2013
Accounts Receivable-Net    
Billed $ 1,077,600,000 $ 1,177,600,000
Unbilled 1,153,800,000 1,076,800,000
Contract retentions 179,300,000 174,300,000
Total accounts receivable-gross 2,410,700,000 2,428,700,000
Allowance for doubtful accounts (69,700,000) (86,400,000)
Total accounts receivable -net 2,341,025,000 2,342,262,000
Period in which unbilled receivables are expected to be billed and collected 12 months 12 months
Sale of trade receivables, outstanding $ 139,200,000 $ 100,200,000