Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)

6 Months Ended

Mar. 31, 2015

Regulated Operations [Abstract]

Regulatory Assets and Liabilities Associated with Gas Utility and Electric Utility

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

	March 31, 2015		September 30, 2014		March 31, 2014
Regulatory assets (a):
Income taxes recoverable	$	111.5	$	110.7	$	106.8
Underfunded pension and postretirement plans	105.5		110.1		91.0
Environmental costs	14.1		14.6		14.5
Deferred fuel and power costs	—		11.8		4.3
Removal costs, net	18.4		16.8		14.4
Other	3.1		4.2		4.9
Total regulatory assets	$	252.6	$	268.2	$	235.9
Regulatory liabilities (a):
Postretirement benefits	$	19.3	$	18.6	$	17.2
Environmental overcollections	—		0.3		1.9
Deferred fuel and power refunds	40.6		0.3		3.2
State tax benefits—distribution system repairs	10.6		10.1		9.0
Other	2.1		3.2		1.8
Total regulatory liabilities	$	72.6	$	32.5	$	33.1

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