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Operations and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Operations and Significant Accounting Policies [Abstract]

Supplemental Statement of Cash Flow Information [Table Text Block]

Supplemental Statement of Cash Flow Information



Consolidated Statement of Cash Flows
Supplemental Disclosure
Year Ended December 31	2011			2010			2009
Millions
Cash Paid During the Period for Interest – Net of Amounts Capitalized		$43.2			$35.7			$29.8
Cash Received During the Period for Income Taxes (a)	$(11.4)			$(54.2)			$(5.6)
Noncash Investing and Financing Activities
Increase (Decrease) in Accounts Payable for Capital Additions to Property, Plant and Equipment		$5.9			$7.5		$(24.1)
AFUDC – Equity		$2.5			$4.2			$5.8
ALLETE Common Stock Contributed to the Pension Plan	$(20.0)			—			$(12.0)


(a)	Due to bonus depreciation provisions in 2009 and 2010 federal legislation, NOLs were generated which resulted in little to no estimated tax payments, and refunds were received from NOL carrybacks against prior years' taxable income.

Accounts Receivable [Table Text Block]



Accounts Receivable
As of December 31	2011				2010
Millions
Trade Accounts Receivable
Billed		$63.7				$67.6
Unbilled	15.6				18.9
Less: Allowance for Doubtful Accounts	0.9				0.9
Total Trade Accounts Receivable	78.4				85.6
Income Taxes Receivable (a)	1.3				13.9
Total Accounts Receivable - Net		$79.7				$99.5


(a)	Income Taxes Receivable decreased from 2010 due to the collection of a 2010 NOL carryback claim. (See Note 14. Income Tax Expense.)

Inventories [Table Text Block]



Inventories
As of December 31	2011				2010
Millions
Fuel		$28.6				$22.9
Materials and Supplies	40.5				37.1
Total Inventories		$69.1				$60.0

Prepayments and Other Current Assets [Table Text Block]



Prepayments and Other Current Assets
As of December 31	2011				2010
Millions
Deferred Fuel Adjustment Clause		$17.5				$20.6
Other	9.6				8.0
Total Prepayments and Other Current Assets		$27.1				$28.6

Other Liabilities [Table Text Block]



Other Current Liabilities
As of December 31	2011				2010
Millions
Customer Deposits (a)		$16.3				$2.9
Other	29.3				30.8
Total Other Current Liabilities		$45.6				$33.7


(a)	Higher customer deposits in 2011 were primarily due to a customer security deposit for capital expenditures relating to a transmission project.



Other Non-Current Liabilities
As of December 31	2011				2010
Millions
Asset Retirement Obligation		$57.0				$50.3
Other	48.1				43.1
Total Other Non-Current Liabilities		$105.1				$93.4