Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)

9 Months Ended

Jun. 30, 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:

	June 30, 2015		September 30, 2014		June 30, 2014
Regulatory assets (a):
Income taxes recoverable	$	111.8	$	110.7	$	107.2
Underfunded pension and postretirement plans	103.2		110.1		89.2
Environmental costs	14.5		14.6		14.6
Deferred fuel and power costs	—		11.8		9.4
Removal costs, net	19.6		16.8		15.6
Other	5.1		4.2		6.6
Total regulatory assets	$	254.2	$	268.2	$	242.6
Regulatory liabilities (a):
Postretirement benefits	$	19.6	$	18.6	$	17.5
Environmental overcollections	—		0.3		1.6
Deferred fuel and power refunds	45.6		0.3		—
State tax benefits—distribution system repairs	10.9		10.1		9.3
Other	1.4		3.2		1.9
Total regulatory liabilities	$	77.5	$	32.5	$	30.3

(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.