Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Business Segments [Table Text Block]

	Quarter Ended					Six Months Ended
	June 30,					June 30,
	2018			2017		2018			2017
Millions
Operating Revenue (a)
Regulated Operations
Residential		$30.7			$27.6		$71.4			$67.1
Commercial	36.2			33.7		72.8			71.9
Municipal	13.7			12.3		27.7			30.5
Industrial	115.3			121.6		230.2			243.3
Other Power Suppliers	42.7			41.7		86.4			82.9
CIP Financial Incentive (b)	—			5.5		—			5.5
Other	19.2			22.5		39.5			45.3
Total Regulated Operations	257.8			264.9		528.0			546.5
Energy Infrastructure and Related Services
ALLETE Clean Energy
Long-term PSA	12.4			13.7		31.0			31.5
Other	5.9			5.9		11.9			11.8
Total ALLETE Clean Energy	18.3			19.6		42.9			43.3
U.S. Water Services
Point-in-Time	25.7			23.9		48.0			45.7
Contract	9.5			8.8		19.0			17.7
Capital Project	6.3			5.7		12.7			7.1
Total U.S. Water Services	41.5			38.4		79.7			70.5
Corporate and Other
Long-term Contract	22.7			23.2		42.7			45.3
Other	3.8			7.2		9.0			13.3
Total Corporate and Other	26.5			30.4		51.7			58.6
Total Operating Revenue		$344.1			$353.3		$702.3			$718.9
Net Income (Loss)
Regulated Operations		$26.0			$32.4		$69.9			$75.9
Energy Infrastructure and Related Services
ALLETE Clean Energy	6.8			3.8		14.9			10.5
U.S. Water Services	0.2			0.6		(1.2		)	0.3
Corporate and Other	(1.7		)	0.1		(1.3		)	(0.8		)
Total Net Income		$31.3			$36.9		$82.3			$85.9

(a) With the adoption of new revenue recognition guidance, the Company has enhanced the presentation of business segment Operating Revenue. (See Note 1. Operations and Significant Accounting Policies.)

(b) See Note 6. Regulatory Matters.

NOTE 14. BUSINESS SEGMENTS (Continued)

	June 30, 2018		December 31, 2017
Millions
Assets
Regulated Operations		$3,898.2		$3,886.6
Energy Infrastructure and Related Services
ALLETE Clean Energy	620.2		600.5
U.S. Water Services	291.8		292.4
Corporate and Other	304.5		300.5
Total Assets		$5,114.7		$5,080.0