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Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2014

Regulatory Matters [Abstract]

Regulatory Assets and Liabilities [Table Text Block]

Regulatory Assets and Liabilities	June 30, 2014				December 31, 2013
Millions
Current Regulatory Assets (a)
Deferred Fuel		$20.3				$23.0
Total Current Regulatory Assets	20.3				23.0
Non-Current Regulatory Assets
Defined Benefit Pension and Other Postretirement Benefit Plans (b)	161.6				164.1
Income Taxes	36.6				35.3
Asset Retirement Obligations	17.4				16.0
Cost Recovery Riders (c)	45.7				39.6
PPACA Income Tax Deferral	5.0				5.0
Other	4.5				3.8
Total Non-Current Regulatory Assets	270.8				263.8
Total Regulatory Assets		$291.1				$286.8
Non-Current Regulatory Liabilities
Income Taxes		$17.3				$17.0
Plant Removal Obligations	21.5				19.7
Wholesale and Retail Contra AFUDC	30.1				19.7
Defined Benefit Pension and Other Postretirement Benefit Plans (b)	15.5				16.3
Other	15.7				8.3
Total Non-Current Regulatory Liabilities		$100.1				$81.0

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

(b) Defined benefit pension and other postretirement items included in our Regulated Operations, which are otherwise required to be recognized in accumulated other comprehensive income, are recognized as regulatory assets or regulatory liabilities on the Consolidated Balance Sheet (see Note 14. Pension and Other Postretirement Benefit Plans).

(c) The cost recovery rider regulatory asset is primarily due to capital expenditures related to our Bison Wind Energy Center and is recognized in accordance with the accounting standards for alternative revenue programs.

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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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