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Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2012

Regulatory Matters [Abstract]

Regulatory Assets and Liabilities [Table Text Block]

Regulatory Assets and Liabilities	September 30, 2012				December 31, 2011
Millions
Current Regulatory Assets (a)
Deferred Fuel		$18.2				$17.5
Total Current Regulatory Assets	18.2				17.5
Non-Current Regulatory Assets
Future Benefit Obligations Under
Defined Benefit Pension and Other Postretirement Benefit Plans	276.6				292.8
Income Taxes	28.2				28.6
Asset Retirement Obligation	11.5				9.8
Cost Recovery Riders (b)	11.4				0.7
PPACA Income Tax Deferral	5.0				5.0
Other (c)	1.9				9.0
Total Non-Current Regulatory Assets	334.6				345.9
Total Regulatory Assets		$352.8				$363.4
Non-Current Regulatory Liabilities
Income Taxes		$19.8				$21.9
Plant Removal Obligations	17.5				15.0
Wholesale and Retail Contra AFUDC	11.1				1.5
Other	6.4				5.1
Total Non-Current Regulatory Liabilities		$54.8				$43.5

(a) Current regulatory assets are included in prepayments and other on the Consolidated Balance Sheet.

(b) The increase in cost recovery rider regulatory assets is primarily due to higher capital expenditures related to our Bison projects.

(c) The decrease in Other is primarily due to the Conservation Improvement Program incentive recorded in 2011 and collected in 2012.

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The entire disclosure for detailed information about regulatory assets and liabilities, including current and noncurrent assets created when regulatory agencies permit the deferral of costs to the balance sheet that would otherwise be required to appear on the company's income statement and would be charged against current expenses or revenues, as well as current and noncurrent liabilities created when regulatory agencies permit.

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