Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)

3 Months Ended

Dec. 31, 2014

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:

	December 31, 2014		September 30, 2014		December 31, 2013
Regulatory assets (a):
Income taxes recoverable	$	111.1	$	110.7	$	106.4
Underfunded pension and postretirement plans	107.8		110.1		92.8
Environmental costs	14.7		14.6		14.9
Deferred fuel and power costs	16.7		11.8		0.4
Removal costs, net	17.6		16.8		13.7
Other	2.7		4.2		5.7
Total regulatory assets	$	270.6	$	268.2	$	233.9
Regulatory liabilities (a):
Postretirement benefits	$	19.0	$	18.6	$	16.8
Environmental overcollections	0.2		0.3		2.3
Deferred fuel and power refunds	—		0.3		7.5
State tax benefits—distribution system repairs	10.3		10.1		8.7
Other	3.4		3.2		1.3
Total regulatory liabilities	$	32.9	$	32.5	$	36.6

(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.