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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)
3 Months Ended
Dec. 31, 2015
Regulated Operations [Abstract]  
Regulatory Assets and Liabilities Associated with Gas Utility and Electric Utility
The following regulatory assets and liabilities associated with Gas Utility and Electric Utility are included in our accompanying Condensed Consolidated Balance Sheets:
 
 
December 31,
2015
 
September 30,
2015
 
December 31,
2014
Regulatory assets:
 
 
 
 
 
 
Income taxes recoverable
 
$
117.4

 
$
115.9

 
$
111.1

Underfunded pension and postretirement plans
 
138.3

 
140.8

 
107.8

Environmental costs
 
17.6

 
20.0

 
14.7

Deferred fuel and power costs
 

 

 
16.7

Removal costs, net
 
22.3

 
21.2

 
17.6

Other
 
6.2

 
6.3

 
2.7

Total regulatory assets
 
$
301.8

 
$
304.2

 
$
270.6

Regulatory liabilities (a):
 
 
 
 
 
 
Postretirement benefits
 
$
20.3

 
$
20.0

 
$
19.0

Deferred fuel and power refunds
 
28.1

 
36.6

 

State tax benefits—distribution system repairs
 
13.7

 
13.3

 
10.3

Other
 
1.1

 
1.1

 
3.6

Total regulatory liabilities
 
$
63.2

 
$
71.0

 
$
32.9



(a) Regulatory liabilities are recorded in other current and other noncurrent liabilities in the Condensed Consolidated Balance Sheets.