Business Segments

12 Months Ended

Dec. 31, 2014

Business Segments [Abstract]

Business Segments [Text Block]

BUSINESS SEGMENTS

Regulated Operations includes our regulated utilities, Minnesota Power and SWL&P, as well as our investment in ATC, a Wisconsin-based regulated utility that owns and maintains electric transmission assets in parts of Wisconsin, Michigan, Minnesota and Illinois. Investments and Other is comprised primarily of our Energy Infrastructure and Related Services businesses; ALLETE Clean Energy, our business which acquired four wind energy facilities in 2014 and is developing a wind facility to be sold in 2015, and BNI Coal, our coal mining operations in North Dakota. Investments and Other also includes ALLETE Properties, our Florida real estate investment, and other business development and corporate expenditures, unallocated interest expense, a small amount of non-rate base generation, approximately 5,000 acres of land in Minnesota, and earnings on cash and investments. For a description of our reportable business segments, see Item 1. Business.

	Consolidated			Regulated Operations			Investments and Other
Millions
Year Ended December 31, 2014
Operating Revenue		$1,136.8			$1,003.5			$133.3
Fuel and Purchased Power Expense	356.1			356.1			—
Operating and Maintenance Expense	456.2			345.6			110.6
Depreciation Expense	135.7			118.0			17.7
Operating Income	188.8			183.8			5.0
Interest Expense	(54.8		)	(46.9		)	(7.9		)
Equity Earnings in ATC	19.6			19.6			—
Other Income	8.6			7.8			0.8
Income (Loss) Before Non-Controlling Interest and Income Taxes	162.2			164.3			(2.1		)
Income Tax Expense (Benefit)	36.7			39.9			(3.2		)
Net Income	125.5			124.4			1.1
Less: Non-Controlling Interest in Subsidiaries	0.7			—			0.7
Net Income Attributable to ALLETE		$124.8			$124.4			$0.4
As of December 31, 2014
Total Assets		$4,360.8			$3,709.6			$651.2
Capital Additions		$604.3			$583.5			$20.8

NOTE 2. BUSINESS SEGMENTS (Continued)

	Consolidated			Regulated Operations			Investments and Other
Millions
Year Ended December 31, 2013
Operating Revenue		$1,018.4			$925.5			$92.9
Fuel and Purchased Power Expense	334.8			334.8			—
Operating and Maintenance Expense	412.9			322.4			90.5
Depreciation Expense	116.6			110.2			6.4
Operating Income (Loss)	154.1			158.1			(4.0		)
Interest Expense	(50.3		)	(42.1		)	(8.2		)
Equity Earnings in ATC	20.3			20.3			—
Other Income	9.3			4.7			4.6
Income (Loss) Before Non-Controlling Interest and Income Taxes	133.4			141.0			(7.6		)
Income Tax Expense (Benefit)	28.7			36.1			(7.4		)
Net Income (Loss)	104.7			104.9			(0.2		)
Less: Non-Controlling Interest in Subsidiaries	—			—			—
Net Income (Loss) Attributable to ALLETE		$104.7			$104.9		$(0.2)
As of December 31, 2013
Total Assets		$3,476.8			$3,160.8			$316.0
Capital Additions		$339.5			$326.3			$13.2

	Consolidated			Regulated Operations			Investments and Other
Millions
Year Ended December 31, 2012
Operating Revenue		$961.2			$874.4			$86.8
Fuel and Purchased Power Expense	308.7			308.7			—
Operating and Maintenance Expense	397.1			310.0			87.1
Depreciation Expense	100.2			93.9			6.3
Operating Income (Loss)	155.2			161.8			(6.6		)
Interest Expense	(45.5		)	(39.8		)	(5.7		)
Equity Earnings in ATC	19.4			19.4			—
Other Income	6.0			5.1			0.9
Income (Loss) Before Non-Controlling Interest and Income Taxes	135.1			146.5			(11.4		)
Income Tax Expense (Benefit)	38.0			50.4			(12.4		)
Net Income	97.1			96.1			1.0
Less: Non-Controlling Interest in Subsidiaries	—			—			—
Net Income Attributable to ALLETE		$97.1			$96.1		$1.0
As of December 31, 2012
Total Assets		$3,253.4			$2,962.4			$291.0
Capital Additions		$432.2			$418.2			$14.0