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Energy Services Accounts Receivable Securitization Facility (Tables)
 3 Months Ended
Dec. 31, 2017
Transfers and Servicing [Abstract]  
Schedule of Transfer of Trade Receivables
Information regarding the trade receivables transferred to ESFC and the amounts sold to the bank for the three months ended December 31, 2017 and 2016, as well as the balance of ESFC trade receivables at December 31, 2017, September 30, 2017 and December 31, 2016, is as follows:
 
 
Three Months Ended December 31,
 
 
2017
 
2016
Trade receivables transferred to ESFC during the period
 
$
270.6

 
$
246.4

ESFC trade receivables sold to the bank during the period
 
$
48.0

 
$
66.0


 
 
December 31, 2017
 
September 30, 2017
 
December 31, 2016
ESFC trade receivables — end of period (a)
 
$
101.0

 
$
44.8

 
$
81.4

(a)
At December 31, 2017, September 30, 2017 and December 31, 2016, the amounts of ESFC trade receivables sold to the bank were $45.0, $39.0, and $35.0, respectively, and are reflected as “Short-term borrowings” on the Condensed Consolidated Balance Sheets.