Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)

12 Months Ended

Sep. 30, 2015

Regulated Operations [Abstract]

Regulatory Assets and Liabilities Associated with Utilities

The following regulatory assets and liabilities associated with Utilities are included in our accompanying Consolidated Balance Sheets at September 30:

	2015		2014
Regulatory assets:
Income taxes recoverable	$	115.9	$	110.7
Underfunded pension and postretirement plans	140.8		110.1
Environmental costs	20.0		14.6
Deferred fuel and power costs	—		11.8
Removal costs, net	21.2		16.8
Other	6.3		4.2
Total regulatory assets	$	304.2	$	268.2
Regulatory liabilities (a):
Postretirement benefits	$	20.0	$	18.6
Environmental overcollections	—		0.3
Deferred fuel and power refunds	36.6		0.3
State tax benefits — distribution system repairs	13.3		10.1
Other	1.1		3.2
Total regulatory liabilities	$	71.0	$	32.5

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